Despite the undoubtedly huge opportunities for growth that currently exist in aquaculture — particularly in Asia — the rising costs associated with farm inputs, raw materials and feed remain a growing concern. Maintaining an optimal feed conversion ratio is now more important than ever, and managing costs is key to operating a successful and profitable fish farm. Reducing costs in an effort to maximize profits must be done cautiously, however, so as not to negatively impact the rate of progress — and some factors that seem relatively minor can actually have a dramatic impact on growth. My top five management tips for reducing costs on your farm are included below.

1. Provide a nutritionally balanced feed.

It should come as no surprise that, generally, the operational element producers spend the most money on is feed. In fact, some farms report that feed constitutes as much as 50–70% of their operational costs. Although important, the cost per pound should not be the primary deciding factor when it comes to selecting feed; performance must also be considered. Using a subpar feed can actually be more costly in the long run, resulting in an unwanted increase to your feed conversion ratio (FCR). Based on the FCR, farms can improve the amount of feed necessary to produce one unit of meat. Lower-cost feed is often seen as the most efficient — but even if the feed cost per pound of fish or shrimp produced is lower, when you take the growth rate and other factors into account, the bottom line will be affected by the time the fish reaches market size.

Evaluating feed performance by considering multiple characteristics is both efficient and practical. Some characteristics to consider include:  

• Feed efficiency
• Growth rate
• Overall quality
• Digestibility
• Health and immune support
• Reduced medication costs
• Water quality maintenance

The quality and integrity of the selected feed will vary for different species and stages of life. Formulating the feed correctly will help ensure the best results for both the animal and the farm. Determining the protein content is a simple and common way to evaluate feed quality — the higher, the better.

2. Support health.

Providing feed that offers a good nutritional balance will directly impact both the FCR and the overall success of your farm. Vitamins and minerals must be added to the feed in order to create a nutritionally balanced and truly complete diet that will meet the basic nutritional requirements of fish and shrimp.

Each species and stage of growth has specific nutritional needs, but a healthy gut is essential to achieving and maintaining optimal health for all fish and shrimp. The intestinal microflora, gut morphology, the immune system and nutrient uptake — as well as how each of these elements interact — all play a role in the health and performance of fish and shrimp. Mannan-oligosaccharides (MOS) are proven to influence gut health; however, different methods of fermentation, manufacturing and yeast strains can greatly impact functionality.

Animals in farmed environments also require essential nutrients to meet their basic nutritional needs. Organic trace minerals are ideal because they are more bioavailable and better absorbed, stored and utilized by the animal than inorganics. Alltech has proven that organic trace minerals in the form of Bioplex^® and Sel-Plex^® can be included at significantly lower levels while still supporting animal performance, effectively optimizing animal mineral requirements and reducing their negative impact on the environment.

3. Maintain optimal water quality.

Proper water quality maintenance is dependent on an understanding that the correct water quality and culture for fish and shrimp is absolutely essential. The ideal environmental conditions will vary among different species of fish and shrimp. Not maintaining these conditions could negatively affect growth and performance — and the risk for disease on the farm could potentially increase if the immune response declines.

Using a nutritionally balanced, quality selection of raw materials in your aqua feed will result in higher palatability and digestibility and will be directly evident in the waste excreted by the fish and shrimp. Low feed digestibility will lead to increased protein and mineral excretion. This waste can contain potentially harmful amounts of nitrogen and ammonia, which can pollute the water and endanger both fish and shrimp.

When selecting feed, pay closer attention to protein utilization than to protein content, as this can save both time and some of the labor costs associated with treating water and overall management.

4. Develop a best-practices management program.

This is essential for achieving optimal farm performance. A well-implemented management program will support better feeding and biosecurity practices.

• Review feeding tables for accurate information on the frequency of feedings, feeding rates, ration sizes and timing.
• Communicate well with team members doing less technical work; this is crucial for successful implementation. Make them aware that both overfeeding and underfeeding can negatively impact the FCR — and that, alternately, accurate feed management can greatly improve farm results.
• Automated feeding technologies require an initial investment, but they actually help reduce labor costs over time and put an end to feeding practices that can contribute to poor water quality.

The proper management practices mentioned above will also create greater opportunities for scaling.

5. Implement technology.

Recirculating aquaculture systems (RAS) are a relatively recent innovation. Designing an RAS facility gives producers more control and allows for the heightened management of aquaculture systems. Having complete control over all of the elements of production helps ensure a stable environment, as well as a reduction in the stressful conditions that can impact and weaken the animal’s immune system. Choosing the correct feed is equally important with these types of systems.

The mechanical filter in an RAS facility will remove large and firm feces. Producers should know, however, that providing a feed that is not suitable for this environment can result in the production of excess waste, reduced nutrient uptake and poor water quality.

Profitability relies on optimized FCR. Fish are sensitive to several external factors, including fluctuating water temperatures, water quality and oxygen levels — all of which can impact growth and performance.

Alltech Coppens is a leading developer and producer of fish feed. The Alltech Coppens team performs trials studying the digestibility of feed formulations to understand how raw materials interact with each other and affect certain characteristics. Once the ideal ingredient combination is determined and paired with Alltech’s nutritional solutions, we formulate and develop a diet specifically tailored to your unique species and farming environment.

To learn more about reducing costs on your farm, contact us at aquasolutions@alltech.com.

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As a horse owner, there are few things more stressful than dealing with a hay shortage. Hearing the dreaded words, “I’m sorry, but I’m all out for the year,” can leave even the most prepared owner scrambling. Unfortunately, changing weather patterns have caused hay shortages to become increasingly more common throughout the U.S. Some areas have experienced sustained droughts, making it nearly impossible for crops to yield adequate supplies, while other areas have experienced several consecutive years of extremely wet spring and summer seasons, making it difficult for producers to cut hay in a timely manner. This has resulted in decreased supplies, lower-quality forages and record high prices. While some parts of the country are still producing ample supplies of high-quality hay, accessibility for those experiencing shortages can be limited by the challenge and expense of shipping.

Things would be far less challenging if we could just increase concentrates to make up for the decreased amount of hay in our horses’ diets. While it may be tempting to do this when hay supplies are limited, we must keep in mind that horses require forage in their diets; removing it could have major health and behavioral consequences. A constant supply of fiber is required to keep the microbial populations in the horse’s intestinal tract happy, and limiting or removing forage can result in issues such as colic and gastric ulcers. In addition, limiting forage can result in increased occurrences of unwanted vices, such as wood-chewing.

If possible, at least part of the fiber in the diet should come from long-stemmed forages, like hay or pasture grasses. Horses are grazing animals that have evolved to consume small amounts of forage throughout the day — and long-stemmed fiber provides them with much-needed “chew time.” Short-stemmed and processed fiber sources take less time to consume, which can lead to boredom and, in turn, the development of stereotypical vice behaviors. Research has shown, however, that horses can survive on a diet featuring only short-stemmed or processed forages as the source of fiber. As long as care is taken to decrease the horses’ boredom — which can be done by feeding multiple small meals, among other strategies — these alternative forage sources can be used to stretch your limited hay supply.

What steps can you take if you are a horse owner facing a hay shortage?

1. Get the most out of your hay supply. Purchasing higher-quality hay gives you an upper hand because it allows you to meet your animal’s nutritional requirements with less than what would be required if you were feeding a lower-quality hay. Feeding smaller, more frequent meals and using hay nets and feeders can greatly reduce the amount of hay that is wasted.
2. Increase grazing. Depending on the availability and time of year, increase the time spent on pasture to allow for the increased consumption of fresh grass, which can help to reduce your hay burden. A rotational grazing strategy, along with a carefully organized pasture maintenance plan, can help thwart the detrimental effects increased grazing time can have on pasture quality.
3. Consider purchasing bagged pelleted, cubed or chopped hay. These items can be purchased at many local feed supply stores, making them easily accessible alternative forage sources. They can be made from grass or legume hay, but the most common sources are timothy and alfalfa. Although they are more expensive than traditional baled hay, these alternatives are both dust- and mold-free, can be easily stored for long periods of time and often come with a minimum basic nutritional analysis on the bag. Pellets, which are formed from dried, ground hay, provide the nutrition and fiber of standard forage but do not provide the same bulk for gut fill as long-stemmed forages. Cubes are simply pressed chopped hay, but caution should be used when feeding cubes to horses that are prone to choke. For senior horses or those with dental issues, soaking pellets and cubes can make this source of forage somewhat easier to consume. Chopped hay — often called chaff — is simply hay that has been cut into short pieces prior to bagging. At one time, chaff was made primarily from straw that provided little nutritional value, but higher-quality grass and legume chaff is now commercially available.
4. Haylage may help. Although they are not a popular feed choice in the U.S., ensiled forages can also be safely fed to horses, provided that some precautions are taken. Haylage should only be purchased from reputable sources, as incorrect preparation or storage can result in contamination by mold or botulism bacteria. Because of its unique taste and smell, it may take time for horses to get used to eating haylage. It is important to note that haylage can actually provide more nutrients than baled hay, as the ensiling process retains nutrients better than traditional hay curing.
5. Extend your hay supply with a commercially available product. While beet pulp is not appropriate as the sole source of fiber in a horse’s diet, it is a good, palatable source of digestible fiber. It is also relatively inexpensive. Hay stretcher pellets and soy hulls are also good sources of fiber, and they, too, can be used as a partial replacement for hay — but, once again, they should not be used as the only source of fiber in the diet. In addition, many feed producers offer lines of complete feeds, and while these are often marketed for senior horses, they can be found and used for horses at all stages of life. When fed according to manufacturer guidelines, these complete feeds may be fed as the sole ration, requiring no additional forage source. Complete feeds often contain hay meal and are fortified to meet all of the nutritional needs of the horse. They also contain a higher amount of crude fiber than a standard commercial feed.

No horse owner wants to face the headache of a hay shortage. Ensuring that your horses are receiving adequate nutrition during these times can be challenging no matter how well you have planned. Fortunately, several options exist that can help you stretch your hay supply and keep your horses happy and healthy through these stressful times.

I want to learn more about equine nutrition.

The following is an edited transcript of Tom Martin's interview with Dr. Kyle McKinney. Click below to hear the full interview. 

Tom:              The food industry has a four-quadrillion-dollar problem. You heard that right. This number represents the losses due to unused or misused nutrients in animals. With hundreds of thousands of acres being dedicated to farmland each year, agriculture is an important force that is continually shaping our world. But could a new enzyme begin to unlock this four-quadrillion-dollar opportunity? Is this the real key to creating a Planet of Plenty™?

                       As the global director of Alltech's Alternative Raw Materials and Feed Efficiency platform, Dr. Kyle McKinney is focused on feed efficiency. He earned a Ph.D. in agricultural biotechnology, focusing on the development of microbial fermentation systems to produce complex enzymes that improve feed and nutrition. Dr. McKinney joins us to talk about new opportunities for food and our future. Thanks for joining us, Kyle.

Kyle:              Thank you very much.

Tom:             Before we talk about the future, where are we today? Where is the state-of-the-art in feed efficiency right now?

Kyle:              When we talk about this opportunity, we consider the future of food and feeding the population. This whole concept and idea comes from the fact that, over the next 20 to 30 years, we're going to add two to three billion more people to the population. People say, during that timeframe over the next 30 years, we will have to produce more food in 30 years than we produced in the history of mankind.

                       When we read about the future of food, we see the positives and we see the challenges, the opportunities and some downright scary aspects, such as not having enough calories — not having enough food. So, we look at this as an opportunity — an opportunity to utilize technology, specifically an enzyme, to help the animal digest more available nutrients from our fields. I don't look at the doom and gloom. I believe that we will have plenty of food, and I believe that, when we look at our feedstuffs and you look at how much we lose in terms of nutrients and calories now when we're feeding our animals, it's an enormous opportunity — a four-quadrillion-dollar opportunity.

Tom:             We're tossing around some enormous numbers here. I mentioned that number: quadrillion. For perspective's sake, that's 1,000-trillion dollars. If you place one quadrillion British pound coins on top of each other, they reach beyond our solar system. That's how much we're talking about. We're talking about four quadrillion dollars in losses due to unused or misused feed in animals. So, the scope and the proportion of this is beyond imagination. When we hear about unused or misused feed, what does that mean, and how does this happen?

Kyle:               If you put some context behind that number, we produce about 3 billion tons of grains per year. Much of that goes into feedstuffs to feed our animals. The problem is that we lose about 25 percent, on average, of the available nutrients because of fibrous components in the feeds. I use the terminology of a bird nest that traps nutrients and the animal can't digest.

                        So, when we look at and consider 3 billion tons of feed, of grain, and we consider the 25-percent losses, and you look at the calorie levels of all those grains, that's really where we get to in terms of this four quadrillion, which is an enormous number to even consider.

Tom:              It is, it is. We hear that there's a new enzyme that could transform this problem into something of an opportunity. What is the new enzyme and how was it identified?

Kyle:               Our focus has always been on getting the most out of our diets. To do that, you have to consider that there are lots of components in a diet that trap nutrients — lots of variations of fiber, if we want to go that simple. To break all those fibrous components down, we believe it takes many enzymes.

                        We focused on a technology called solid state fermentation. Solid state fermentation is an ancient technology. What we are able to do is utilize a non-GMO organism, a fungus. We grow that fungus on a high-fiber feedstuff, and it produces a whole host of natural enzymes that are designed to break down grains and feedstuffs because we start with that.

                        So, our approach is utilizing solid state fermentation to produce an enzyme complex, many enzymes, to work on the many fiber substrates that we have in a diet. We don't focus on just one or two. We're focusing on a dozen or more of these substrates that are trapping nutrients. We can break those down. We see the most benefit in terms of nutrient availability for the animal.

Tom:              And is this technology being applied?

Kyle:               This technology is being applied. We've been pioneers in this solid state fermentation system. We have a facility in Serdan, Mexico, that produces for Alltech globally. We do research in terms of looking at how we can improve that system. We do research looking at new microorganisms that may give us even better enzyme complexes to focus on and get more and more out of the diet. That's the challenge the industry has, and that's the challenge we pose for ourselves: how do we continue improving the efficiency of those diets? Which means, as we feed more animals to feed the growing public, we've got more grain sources, because we're getting more efficient. That's one way we're approaching this Planet of Plenty^TM concept, using this solid state fermentation enzyme technology.

Tom:              And in this application, you're actually seeing those results.

Kyle:               Absolutely. We see it with our enzyme system. For example, we can improve the digestibility of this grain feedstuff 7 to 8 percent. So, if you take 7 to 8 percent of the amount of calories that we're losing in all of our grains in feedstuff, it's an enormous number. It's going to allow us to feed more animals in the future.

Tom:              I know that you spent some time working for Alltech in Costa Rica on a project focused on using the Alltech Crop Science portfolio to control disease and reduce chemical applications. It also allows your team to set up a fermentation lab to evaluate more sustainable microbial solutions for disease control. How has the knowledge gained from that work informed what you're doing now?

Kyle:               The tie between those two projects is simply our expertise in fermentation, in microbial fermentation. We learned a lot about producing microorganisms in our systems in Costa Rica that we were able to take to our facilities in Kentucky and our facilities in Mexico and others and be more efficient in how we produce our products. So, the tie there was simply the fact that we went to Costa Rica, we set up a fermentation system, we're very successful in utilizing this type of technology to reduce chemical input. What we gained is knowledge of how to become more efficient in our production models that allowed us to move to different locations that we have production locations in globally.

Tom:              Earlier, you referenced population growth in the world. I'm wondering how this new enzyme will factor in supporting a Planet of Plenty.

Kyle:               If you look at the numbers, in 2050, there's an expectation that we will require 70 percent more meat, more food — and that's something around 500 million tons more meat in 2050 than we're producing today. That's something around 1 billion more tons of milk than we're producing today.

                        In the last 60 years, we haven't had additional acres of land growing grains, so we've accomplished amazing feats in agriculture; with less land, we produced more meat. Moving into the next 30 years, who knows how much more additional land we'll free up for grain production to produce more protein? This SSF enzyme technology and enzyme complex is going to be critical for the simple fact that we don't know that we'll have more acres of land. We probably will find it somewhere. But we've got to get more efficient because we do know one thing: we're going to have to produce more meat and protein to feed the population.

Tom:              Kyle, what else are you keeping an eye on in terms of alternative raw materials? In a traditional industry like farming, why is it important to look for new ways of doing things?

Kyle:               The hot topics in alternative materials right now are insect proteins. In Kentucky, it's hemp. [Kentucky is] the number one hemp-producing state in the United States. How is that going to play into how we're feeding animals in the future is a key question, and it's our duty to keep an eye on and understand how some of these alternative materials will play a role as we feed animals. At the moment, we're still very traditional corn and soy. But the new technologies, specifically in terms of insect protein and insect meals, are going to be probably the fastest-growing segment in the next five to ten years.

Tom:              That's fascinating. I've been wondering if Alltech had an interest in hemp because it's so popular in Kentucky (where Alltech is headquartered) and it grows all over the state. Is there actual activity in this area?

Kyle:               Our activity began with Alltech Crop Science looking at some of our technologies for improving efficiency. That is a project that's ongoing. But in terms of animal feed and animal nutrition, our researchers are digging into how hemp will play a role. Right now, it's not going into diets, but we have to keep an eye on this and see how that changes and see how it fits into feeding strategies.

Tom:              Getting back to insects — also fascinating, and there certainly are plenty of them. But are there particular species that are of interest?

Kyle:               The number-one insect used right now is called the black soldier fly. Picking the right insect is all in determining the growth rate of the insect — how much protein is in that fly meal. So, black soldier fly is the number-one insect producer at the moment.

Tom:              What would you say are the trends that you're keeping your eye on right now?

Kyle:               I think the trends that we're looking at in Alltech really revolve around technology and agriculture. How are we getting more efficient in monitoring animals, feeding animals, observing the nutritional needs of the animals, and what new technologies are going to allow us to do that? So, I think we, internally, have some programs where we're looking at innovation for sensors, for example. But it all gets back to us focusing on how we are improving the nutritional component of that animal and improving profits for our farmers and our growers.

Tom:              Dr. Kyle McKinney, Alltech's Alternative Raw Materials and Feed Efficiency platform global director. Thank you so much for joining us.

Kyle:               Thank you.

Dr. Kyle McKinney spoke at ONE: The Alltech Ideas Conference (ONE). Click here to learn about ONE and how you can access innovation on demand. 

Click here for more information about the Alltech Enzyme Management Program.

Over the last three decades, aquaculture has become the world’s fastest-growing food sector. During this time, farmers have faced a number of unique challenges but have adopted new technologies to address them. One issue, however, remains a key concern and a continually developing threat: disease. There have been significant advances in vaccination practices over the years, but the diversity of pathogens — bacterial, viral and parasitic — sometimes makes vaccination impractical or unavailable to protect against certain threats.

Building a defense

Pathogens are opportunistic and exist naturally in all environments, including animal populations. When conditions become suboptimal and/or stressful, the natural defenses of the animal are challenged and pathogens are given the chance to flourish, which often leads to disease, poor performance and mortality. Disease does not occur in isolation; rather, it is the result of multiple factors. Diet is just as important for the nutrition and welfare of aquaculture species as it is for humans. The Mediterranean diet, for instance, is recommended to help prevent disease in humans because it includes a rich variety of essential nutrients, such as omega-3 lipids, minerals, vitamins and proteins. These nutrients have also proven to be essential for supporting the health and welfare of livestock and often help producers achieve operational success. As such, Alltech has begun exploring what benefits these nutrients could provide in its advanced nutritional aquaculture solutions.

Minerals presented in their natural, organic form help ensure optimal tissue reserves. When encountering a stressful situation, animals draw on these reserves to prevent cellular damage. The maintenance of a healthy gut helps ensure optimal nutrient uptake, leading to improved growth and performance. A healthy gut and mucosal barrier can also keep pathogens from passing through the damaged areas of the gut and into the bloodstream, thus improving the animal’s natural immune defenses.

Feed selection and management

As feed costs can account for more than 50 percent of farm production costs, the correct choice of feed should not be underestimated, nor should it be limited to the application of modern nutritional engineering. Feeds must also be tailored to each species and/or hybrid and should be appropriate for the specific culture methodology and environment; when feeds do not meet these standards, they are often not the most cost-effective selection for the farmer.

When selecting feed, fish farmers should pay attention to three key characteristics: structure, size and stability. Visually, the structure of the pellet should be firm and robust. A strong pellet must withstand the manufacturing and transportation process, minimizing the amount of dust produced. Dust is extremely harmful to fish, as it can damage their gills and affect the water quality. The size, ratio and sink/float speed of the feed must also be suitable for different species and environments; for example, fish in RAS facilities and fish in ponds will have very different requirements.

Pellets must also have a high water stability, as uneaten feed can contaminate the water and leach nutrients. Following best practices, uneaten pellets must be removed promptly in order to avoid sub-optimal feeding practices, negative environmental impacts and an increased feed conversion rate.   

The mechanical filter in an RAS facility will remove large and firm feces. However, providing a feed that is not suitable for this environment can result in the production of excess waste, reduced nutrient uptake and poor water quality.

Profitability relies on optimized feed conversion ratios. Fish are sensitive to external factors; fluctuating water temperatures, water quality and oxygen levels can impact growth and performance.

Tailored nutritional solutions

Alltech Coppens, a leading developer and producer of fish feeds, performs digestibility trials on feed formulations to understand how raw materials interact with each other and affect certain characteristics. Once the ideal ingredient selection is chosen and combined with Alltech’s nutritional solutions, a diet is formulated and developed specifically for that species and its farming environment.

Alltech’s aquaculture solutions platform has been proven to help maintain a protective balance between the aquaculture species, nutrition and environment. In addition, Alltech’s Mineral, Gut Health and Mycotoxin Management programs provide holistic management practices for addressing the key challenges outlined above. For more information about implementing these programs in your operation, please reach out to us at aquasolutions@alltech.com.

I want to learn more about aquaculture nutrition and management.

Vitamins are essential micronutrients required in all poultry diets, with each vitamin playing a critical role in the bird’s overall health and performance. As such, it is important to manage low-inclusion premixes to conserve vitamin stability and maintain efficacy.

Vitamin class and quality

All vitamins are crucial for normal biological function. Vitamins fall into two classes: fat-soluble and water-soluble. Fat-soluble vitamins (including vitamins A, D, E and K) are absorbed and stored in fatty tissues of the body. These fat-soluble vitamins are critical for vision, mucous tissue integrity, immunity and blood coagulation, as well as calcium and phosphorus metabolism. Alternatively, water-soluble vitamins (including vitamins C, B-complex and choline) are not stored within the body. Water-soluble vitamins metabolize carbohydrates, proteins and fats, and they also contribute to the integrity of skin and ligaments, bone calcification and hormone synthesis.

Several physical and chemical factors — including exposure to oxygen, pressure, friction, temperature, humidity, light, pH and redox reactions — can decrease vitamin stability, which will negatively affect bird performance. Pelleting, for example, involves friction, pressure, heat and humidity, which can expose vitamins to adverse chemical environments and compromise the vitamin’s stability. Choline chloride is particularly harsh for vitamins because of its hygroscopic and alkaline properties, so separate choline chloride from vitamin premixes whenever possible.

Maintaining an awareness of the storage conditions and of the overall product composition is important. The ideal conditions will be different for each vitamin. For example, vitamins B1 and B6 are more stable in acidic environments, whereas pantothenic and folic acids are more stable in alkaline environments. Vitamin B12 is sensitive to several environmental factors, including strong acids, alkali conditions and light. Providing vitamin premixes with ideal conditions but storing them alongside trace minerals can also compromise their stability. Copper, zinc and iron are the most reactive toward vitamins, while manganese and selenium tend to be the least reactive trace minerals. The form of the trace mineral can also influence its reactivity toward vitamins; sulfates and carbonates are the most reactive, while oxides and chelated trace mineral forms are the least reactive. Therefore, formulating vitamin premixes in combination with chelated trace minerals will aid in prolonging vitamin stability.

Proper management techniques are critical for maintaining vitamin potency and stability. If possible, store trace minerals and vitamins separately in the initial manufacturing facilities. When combining vitamins and trace minerals in premixes, consider utilizing chelated trace minerals. Additionally, reduce the overall storage time of premixes as well as complete feed. Ensure the use of proper storage containers that minimize light and oxygen penetration. Climate-controlled storage will also reduce the risk of exposing vitamins to high environmental temperatures and humidity. Implementing these management strategies can help to ensure that we are feeding optimal-quality vitamins, which will only serve to enhance overall bird health and performance.

I'm interested in learning more about poultry nutrition.

The following is an edited transcript of Tom Martin's interview with Dr. Richard Murphy and Dr. Roger Scaletti. Click below to hear the complete audio:

Tom:            Why are we still using inorganic minerals? Why do nutritionists continue to overfeed nutrients and waste money? How can a mineral management program improve the health of the herd? Here to discuss these questions, among others, about the role of minerals in animal nutrition are Dr. Richard Murphy, research director at the Alltech European Bioscience Center in Dunboyne, Ireland, and Dr. Roger Scaletti, who focuses on the technical sales and support of the Alltech® Mineral Management program. Thank you both for being with us.

                    There may be some confusion and contention around the issue of organic versus inorganic minerals and the effectiveness of one over the other. First, Dr. Murphy, a brief primer, if you would, on the difference between organic versus inorganic?

Richard:        That's a great way to start this conversation. I guess it's going to be a fun conversation over the next while! Effectively, when we talk about organic minerals, all we've done is taken the mineral source, we've reacted it with an amino acid or a peptide or some other organic bonding group, and we basically make that mineral protected. Rather than thinking about an inorganic mineral as just being straight mineral, with the organic mineral, we've protected the mineral, and that protection offers us a lot of benefits. Particularly in the intestinal tract, it offers us stability — changing the pH that we would see in the gastrointestinal tract.

                    For instance, at the start of the intestinal tract, the pH is neutral. When it gets into the gastric environment — or the stomach — it becomes very acidic. Those changes in pH can impact amino acid. With the organic mineral, what we're doing is we're bonding it to either an amino acid or a peptide or some other organic molecule, and that protects us as it moves through the GI tract and makes it much more stable.

Tom:            Dr. Scaletti, just to be clear, is the use of organic versus inorganic specific to the production method? In other words, are organic minerals only for organic farms?

Roger:          Another great question. No, organic minerals would be beneficial for any farm. In a typical presentation, I would start off by saying when I mention organic minerals — I'm not talking about not using pesticides or herbicides — I'm talking about the chemistry of carbon, just like Dr. Murphy mentioned. Remember, there is no real requirement for inorganic trace minerals.  Animals need zinc, copper, manganese, selenium, etc. every day, but the source of that trace mineral is not dictated, so organic minerals are suitable for all different production systems.

Tom:            Okay, for either of you, has research proven that an organic mineral is more bioavailable and usable by the animal?

Richard:        Absolutely. I think Roger would agree. We've got an absolute wealth of information that we've built up over the last 20 years or so showing that the organic minerals are a far superior source of mineral to use in all diets.

Roger:          Yes, like Dr. Murphy mentioned, the bioavailability part, I think, is what gets people's attention initially. But then, at the end of the day, the farmer, no matter what species, is looking for a production response. So, we also have research covering production responses that you would see as you change your mineral supplementation from inorganic to organic.

Tom:            What is it about organic minerals that makes them more beneficial?

Richard:        For me — my background is in biochemistry — it's trying to understand how minerals interact, not just in terms of how the animal responds to it, but how those minerals would interact with feed and materials, for instance. Certainly, with the organic minerals, you have benefits beyond just health and just performance in that we change the way in which we can impact or influence the nutrients in the diet.

                    With the organic minerals, we know it will have less of an impact on vitamin stability, less of an impact on antioxidant function. Even with some of the enzymes that are part of the gastrointestinal and digestion process — they won't be as impacted by organic minerals as they would by inorganics.

Roger:          Then, to follow a little bit with Dr. Murphy's comment, some of the, for example, enzyme interaction work that we've done in vitro has been done in dairy cows as well, showing that, when you're only supplementing with organic minerals — in our case, Bioplex® and Sel-Plex® — you have a more effective rumen fermentation. So, you're producing more total volatile fatty acids and more butyrate, which is kind of the business of the rumen: to produce those volatile fatty acids. Whether it's a case of the organic minerals enhancing that or leading to accelerated rumen organism replication, it's one possible pathway, but I think another possible pathway would be that you're removing rumen microorganism inhabitation when you take out the inorganic minerals.

Tom:            Which trace minerals are key to improving livestock performance? Is there a shortlist?

Roger:          The shortlist would be zinc, manganese, copper, cobalt and selenium. Depending on where you are in the world, or even within a given country, one of those may be more important than another one. In North America, our most important mineral for supplementation and consideration would be selenium, just based on the background selenium in soil, which is going to dictate the selenium in forages and grains. Those five would be the main ones. On the monogastric animal, we would add iron to that. We have six minerals we'd be talking about.

Tom:            We may have touched on this a little bit before, but what is known about the utilization of the minerals by the animal — or animals, I should say?

Richard:        Well, minerals themselves are used in many different ways. Predominantly, when you look at their role in cellular systems, they're essential co-factors for many different enzymes, for instance. You won't get cellular processes working optimally or working efficiently if you don't have the necessary mineral required for the enzyme to carry out its function, or for the enzyme that's necessary for those biological functions.

                    They're wide-ranging. If you look at copper, for instance, it's involved in many different enzymes that are involved in the antioxidant response. Selenium is a particularly important one in terms of its ability to modulate, not just in antioxidant response, but in many other enzymes that are involved in many other processes as well. So, really, they're essential and critical for the most basic of cellular functions.

Tom:            Are there differences in animal chemistry species to species, or even within species, that cause mineral forms to perform differently?

Roger:          My answer — and this would be more in Richard’s wheelhouse — but just in a ruminant, we have to deal with the rumen, the rumen environment, the rumen microorganisms. In other species, you wouldn't have the rumen part. In equine or in horses, they would have a hindgut fermentation. There’s a difference in terms of how each animal is set up, but for the most part, you're seeing the similar benefits from organic minerals across the species.

Richard:        There is one common factor across all species — we touched on this at the start — which is that change in pH along the length of the GI tract. That's one of the most critical parameters that is involved in defining how good or how poor a mineral source is. If that mineral source is enabled to withstand those constant changes in pH, you won't get it to the sites of absorption in the intestine. You really need to look at having a stable mineral molecule. Obviously, organic minerals are the most stable of those. But even within the different types of organic mineral products that are out there, you'll see distinct differences in terms of the stabilities of individual products, and that will have an impact on how individual products will function in the animal.

Tom:            Why do organic trace minerals mean less inclusion, less waste and better meat quality?

Roger:          Well, to me the starting point would be that you don't need as much mineral to get the job done. Corollary to that, you're getting a more effective job done with organic minerals. I think, over the years, in the industry side of things, it's kind of been a race to the top. One company was using however many PPM [parts per million] — or milligrams — of a mineral, and the next company would add a little more to it, operating under the old adage of more is better.

                    Well, that's really not the case. We found, and have the research to show, that you're getting a more effective response with less mineral use, probably through a lot of the pathways Dr. Murphy mentioned, but it's not always an apples-to- apples comparison. Zinc oxide, at a given parts-per-million, is not going to perform the same as a zinc proteinate, or Bioplex zinc, at a much lower concentration inclusion in the diet.

Richard:        It's actually of interest on the regulatory side — and I think Dr. Scaletti would probably agree with this as well — when you look at changes in legislation over the last number of years, in particular in the EU, there have been changes in the maximum permissible limits that are allowed in feed. I think the zinc — this is just back to Roger's mention of zinc oxide there — I think the zinc area is one in which we can demonstrate that quite nicely. There's a lot of talk in the EU about how they're going to ban zinc oxide use as a prophylactic and prevent scouring in piglets and calves, for instance.

                    One of the reasons for that that they've quoted is that the regulators are concerned about the impact that zinc oxide can have on co-selection for antimicrobial resistance. But when you look at the permissible limits that they have of zinc in feed, they make reference to the use of phytase, for instance, as being a way to perhaps enhance the effectiveness of the zinc source that's added to the diet or enhance the background level of zinc that's in the feed.

                    All in all, I think there's a move by the regulators. Now, the regulators, if they want to change those limits again, will have to come back and revisit the delineation between inorganic and organic minerals and the differences in terms of the bioavailabilities of those. I think, in the future, we may even see regulators like the EU body — which would be the EFSA (the European Food Safety Authority) — would say, “Okay, we'll need to examine this in more detail.”

                    Certainly, the Brazilian authorities have already done that. They've made a clear delineation between the availability of inorganic and organic mineral sources. The more recent documents that have been published by authorities in Brazil basically delineate clearly between what levels of inorganic you should feed in a diet and what levels of organic you should feed in the diet, and they're distinctly different.

Tom:            As you have observed improvements in performance, are there any lessons? Any takeaways from that experience that have informed what you do going forward?

Roger:          I would say: more isn't better. I think a lot of people are accustomed to looking at a tag or a ration report, and they're looking for a certain number or level of mineral supplementation. That's only so useful if you, then, don't read the ingredient list and see, is it coming from oxide, sulfate, organic proteinate — whatever the case may be. I think the source of mineral is more important than the amount. So again, it's about making sure it's an apples-to-apples comparison, and less doesn't mean less performance. I think a lot of times, at least in the United States, our industry would be looking for high levels of supplementation, and they equate high level with being good or what is essential, and that's not really the case.

Richard:        Just to add to that as well, Dr. Scaletti, I think it's important that the industry really looks at organic minerals and says they're not all the same. There is a misconception, I think, within the industry. You have all these different brand names and different types of organic mineral products. I guess the natural inclination is to say, “Well, it's an organic mineral. One product must be the same as the other.” There are very distinct differences between them.

                    Again, this is back to that concept of how that mineral source interacts or how stable it is as it moves through the GI tract. Certainly, in some of the work that we've seen from the team at our European Biocenter in Ireland, we've basically shown there are very distinct differences in terms of the stabilities of different organic trace mineral products, and that can have distinct impacts, not just on the bioavailability, but also in which [of] those different products would interact with different premix and different feed components.

Tom:            There are some misperceptions out there about minerals. What beliefs are most prominent and how do you address them?

Richard:        I think the biggest misconception is with regard to size. That's probably the biggest industry misconception that's there, and that's a historical one. Originally, when organic minerals first became available, they were simply complexes between amino acids, like methionine or lysine, with copper and with zinc. Certainly, people thought, “Well, if you have a small bonding group, then absorption of it is much better or delivery of it is much easier.” That's not the case. What we've seen is that it's the type of bonding group that's used — so, the type of amino acid. But, particularly when you get into peptide-based technologies like we see in Bioplex, it's the actual amino acid sequence in those peptides. So, it's even more fundamental than we would have thought in the past. The configuration and the type of amino acids present in the peptide would very significantly influence the stability.

                    I think the biggest misconception in the industry about organic trace minerals is that size is important. I can absolutely say with certainty size is not an issue. It's the type of bonding group that's used. And more importantly, when you look at peptides, it's the configuration and the sequence of amino acids that are in the peptide that are of more importance.

Roger:          I would just maybe follow up with that in regard to organic selenium. The battle is typically, “What is the content of selenomethionine in a selenium yeast product?” Dr. Murphy would have research showing it's not only an effect of how much selenomethionine you have present; it's how much of that can be digested and released. So, again, just coming back to that concept of “more isn't always better,” especially if what you're supplementing isn't released — or isn't available — to the animal.

Richard:        Yeah, that's actually a great point, Dr. Scaletti, just on the organic selenium side. Certainly, in the EU, we've seen newer forms of, again, so-called organic selenium sources being produced and available for sale, and these are actually chemically synthesized selenomethionine and selenomethionine derivatives that are distinctly different and have a distinctly different offering than you would see with selenium yeast products, such as Sel-Plex, for instance.

                    Again, it's back to the concept of stability. Free selenomethionine molecule is not necessarily the most stable one when you look at again the influences of those processes in the GI tract. So, certainly, even within organic selenium sources, [it’s a] much, much different proposition now with the availability of these newer chemically synthesized molecules.

Tom:            Livestock in many parts of the world have been overfed inorganic forms of trace minerals, such as copper, manganese and zinc, to offset their inefficient digestibility. The excess ends up in manure, and levels of these trace minerals have gotten so high that it's actually illegal to spread that manure out in the fields to support growth forages or grain. So, what happens to all of that excess manure? We're stuck with it?

Richard:        Well, I guess if we can't spread it, we've got to do something with it, and it looks like we could be. I know from some of the newer technologies that are coming out — some great startup companies that are basically looking at detoxifying heavy metal in soils using microbial-based solutions. So, perhaps, this is one way in which we can look at remediating those heavily contaminated lagoons, if you like.

                    Other options may be stripping-based technologies. These are basically looking at removing minerals, and this will be costly, Tom, I would have to say, removing mineral with EDTA-based chelation. But, certainly, something has to be done, and I think organic minerals are, without a doubt, one of the solutions to the problem. You can look at adding less mineral, having less runoff and then, obviously, less contamination in those lagoons. Certainly, the drive toward reducing environmental contamination will definitely be driven and solved, without a doubt, by the increased use of organic minerals over the next couple of years.

Tom:            In some places, regulation is beginning to force the issue. A number of countries around the world have already passed legislation restricting the use of trace minerals because this overfortification has led to pollution. Do you see this type of legal action as a continuing trend?

Richard:        I guess it goes back to the comment I made earlier about the regulations around zinc and zinc usage in feed, but also, then, the impending ban in the EU on zinc oxide as a prophylactic. I think the regulators will take a greater look at the issue, and I think they will certainly have to start making decisions on whether they promote organic minerals as a way in which we can reduce this or not. It's not the job of a regulator to promote a brand of products, but certainly, I think, when you look at the proposition that organic minerals give in terms of being a solution to the problem, they'll have to start promoting the use of organic minerals as a way in which you can add less, not impacting performance, and have much less of an environmental impact.

Roger:          I would just say that I think the path forward is just going to depend [on] where you are in the world. I don't know that the United States is looking at any of these zinc, manganese or copper regulations any time soon. Our only regulations in terms of trace minerals would be selenium and the mineral we haven't talked about today: iodine. If you're using iodine in the EDDI (ethylenediamine dihydroiodide) form, there are limits on how much you're allowed to feed. Other than that, selenium would be our only regulated mineral, and today, we could go out and supplement as much zinc as we want in any animal in the United States without a problem.

Tom:            Are you seeing growth in the organic minerals market?

Roger:          We're seeing tremendous growth, both globally and regionally. In North America, I think, as people realize, again, that it's not an apples-to-apples comparison or you're not just looking at a level of mineral — that you need to pay attention to the form — that people are realizing that organic minerals have an important role. I also think we're getting a little bit closer on the cost difference; inorganic minerals are still cheaper, but their price keeps going up. I don't know that cost is as prohibitive as it used to be, from a practical farm level.

                    That's probably the only reason people aren't using organic minerals as their only source. It's a cost thing. Now, when you start looking at the response and, then, the return over investment opportunity, well, it's not a cost: it's a profit-maker. So, I think it's just a slow change.

                    When you look at trace minerals, for 60-70 years, we used inorganic minerals; for the past 20, we've used organic. So, it's still pretty new in terms of what's going on in the general supplementation industry. When you look at some of the different documents out there — for example, National Research Council or NRC Guidelines — they really don't get into a discussion on form. As Dr. Murphy mentioned, the Brazilian government recognizes that there are form differences, and some other countries around the world are starting to do so as well. I still think it’s left to feed companies, nutritionists and, ultimately, the farmer or end user to make a decision of, “Do I want to make an investment? If so, how much?” That's kind of where the decision is today.

Tom:            As you continue working toward better performance in animals, are you exploring new ideas for delivering nutrition more efficiently? Is that just an ongoing process?

Richard:        Yeah, it's an ongoing evolution. I think we've moved, over the last number of years, more toward, rather than thinking about nutrition as just being an individual component, we've really focused on the benefits of multicomponent packs. Certainly, there are a lot of different synergies you can get from different products present in a pack and the many ways you can get, I guess, good synergism between those components. Certainly, with some of the Blueprint® products that we have in Alltech, we've seen tremendous increases in health or performance and, again, these are multicomponent impacts. Rather than thinking about nutrition as being individual components added together, we tend to think about the synergism that we can get from multiple components out of them. That's something that we'll focus on more and more over the next couple of years.

Tom:            This has been really enjoyable. I have one final question: what new developments in minerals or mineral feeding strategies do you think we might see within the next five years or so?

Roger:          I don't know if I see a new development as much as just people embracing organic minerals more than they currently do. I'd say, currently, most of the industry would be at some sort of a partial supplementation, where the bulk of the mineral that's being supplemented is inorganic sulfate or oxide, and then they try to come up with how much organic to put in. They want to get all the benefits of organic, but they don't want all the price.

                    I see more of the bigger advancement being, as people just progress through that decision in their head, from partial replacement to more of the full replacement or total replacement, and realizing that organic minerals are what's doing the heavy lifting – that there really isn't a big need for those inorganic minerals that, for maybe just historical purposes, they just can't seem to kick out of the ration.

Tom:            Do you see something in the near future, Dr. Murphy?

Richard:        I'd agree with Dr. Scaletti in that. We’re going to see increased awareness in the benefits of organic minerals and how you can use less of those organic minerals and not have a negative impact on health and performance. That, obviously, is going to feed into an environmental benefit. I think we'll also see changes, perhaps, in the way in which we apply these minerals. I think people are looking more and more toward technology as a driver of agriculture.

                    I think we'll see differences in the next few years in the way in which feed delivery is made, in the way in which you can actually begin to look at delivering feed on farms. I do think we'll see more and more digital-based technologies that will influence feeding strategies, and then, it will obviously influence how we formally feed.

Tom:            Dr. Richard Murphy, research director at the Alltech European Bioscience Center in Dunboyne, Ireland, and Dr. Roger Scaletti, who focuses on the technical sales and support of the Alltech Mineral Management program. Thank you both for joining us.

Richard:        Thank you very much.

Roger:          Thank you.  

Drs. Scaletti and Murphy presented their insights during ONE: The Alltech Ideas Conference (ONE18). Don't miss the chance to hear the latest in animal health and nutrition at ONE19. Click here to learn more. 

The KEENAN “Green Machine” has made its way from Ireland to Northern India, with Gurpreet Singh Grewal being the first KEENAN machine owner in the area. Gurpreet has worked in the dairy business for the past eight years and is currently milking 105 Holstein dairy cows on his farm.

Gurpreet is the owner of HG Grewal Dairy farm in Chimna village, Jagroan Tehsil, in the state of Punjab — an area with a continuously growing dairy sector.

Jagroan Tehsil is one of the leading milk belts of Punjab and is home to most of the Progressive Dairy Farmers Association’s active farmers in the state. Milk is the main product from livestock in Punjab, accounting for nearly 80 percent of the total value of livestock output.

Punjab is considered one of the most progressive states for the dairy industry in India. Dairy farmers in this area are adopting the latest techniques and technology rapidly, and Gurpreet is among those early adopters. He bought a KEENAN ECO50 in December 2017 after attending an Alltech event, completing research and receiving recommendations from his brother. This is the first time Gurpreet has used a Total Mixed Ration (TMR) wagon.

The KEENAN machine in action at HG Grewal Dairy farm.

“I am very much satisfied with the KEENAN machine performance and its contribution to the overall profitability of the farm, as well as with Alltech solutions and technical support,” said Gurpreet. “I highly appreciate Alltech’s technical help in TMR formulations and Alltech In Vitro Fermentation Model (IFM) lab facilities for testing silage samples.”

Gurpreet is particularly pleased with:

• Gentle mixing of TMR — the cows do not separate the feed, so there is less feed waste
• Uniform mixing of TMR, which leads to no sign of Acidosis
• Uniform Body Conditioning Score
• Good processing and mixing of rye grass, which maintains the structure of the fodder
• Increase in milk production

Soon after Gurpreet started using the KEENAN machine, his farm attained peak milk production of 1,660 litres from 56 dairy cows, from December 2017 to January 2018. This was even without changing the TMR formulation.

HG Grewal Dairy farm currently uses the following Alltech products: Yea-Sacc®, Optigen® and Mycosorb A+®.

Please contact india@alltech.com with an questions.

I want to learn more about nutrition for my dairy herd.

Tall fescue (Lolium arundinaceum) is a cool season, perennial bunch grass native to Europe. Since its introduction in the early 1800s, it has spread widely throughout the southeastern and lower midwestern United States. Due in large part to its tolerance for heat and low-quality soils, and its adaptability to a wide range of conditions, tall fescue is now grown on more than 37 million acres of land in the U.S. (Thompson et al., 1993), and it is estimated that more than half of these fields are infected with the fungal endophyte Epichloë coenophiala (Jones et al., 2004). This endophyte provides positive characteristics to the plant, but the secondary metabolites (ergot alkaloids) produced by the endophyte have negative consequences to animals grazing on infected fescue.

The positives and negatives of fescue utilization

Symptoms of tall fescue toxicosis in cattle

The pathology of cattle consuming infected tall fescue can vary greatly depending on the weather and alkaloid concentration. The signs most readily apparent to producers include reduced feed intake (up to 50 percent) and weight gain, decreased milk production, reduced reproductive efficiency, tissue necrosis and a rough hair coat. Collectively, this range of conditions is known as “fescue toxicosis.” The decrease in productivity caused by fescue toxicosis has been estimated to cost U.S. beef producers more than $2 billion per year due to reduced growth, diminished reproductive efficiency and market discrimination because of unthrifty appearance (Kallenboch, 2015). 

Consumption of the ergot alkaloids in endophyte-infected tall fescue results in widespread vasoconstriction in cattle. This reduces the ability of the animal to dissipate heat, resulting in a variety of physiological symptoms, including increased respiration rate and elevated core temperature. This reduction in tolerance to heat leads to less time spent grazing and reduced weight gains, generally called “summer slump.” In colder months, the vasoconstriction from fescue can combine with natural vasoconstriction related to thermoregulation, resulting in tissue death in extremities such as ear tips, tails and feet, commonly known as “fescue foot.”

The vasoconstriction also reduces blood flow to the rumen, decreasing volatile fatty acidy (VFA) absorption. Consumption of ergot alkaloids also reduces passage rates of digesta from the rumen, likely by reducing rumen motility. These alterations work together to reduce nutrient availability, contributing to the reduced growth rate frequently observed in cattle grazing fescue. 

I would like more information on fescue and Alltech solutions for beef cattle.

Today’s pigs have come a long way from those of even 20 years ago. A better understanding of genetics, nutrition and substantial research have all played a significant role in improved performance, reproduction and overall swine health. So, it begs the question: Have swine housing and management technologies kept pace with the modernization of today’s pig?

According to Steve Toft, Hubbard Feeds swine specialist, they have. We sat down with Steve at the 2018 World Pork Expo to collect his insights.

What’s new in housing, equipment, technology or swine management that’s leading to improved performance and animal comfort?

In wean-to-finish barns, there seems to be greater focus and a higher level of intensive care given in the first few weeks after arrival. Examples include:

• Brooders: These lamps are designed to increase comfort and growth rates in pigs by keeping them warm and reducing stress.

• Comfort mats: This addition can significantly reduce the number of pigs commonly lost during farrowing by keeping crates warm, dry, safe and clean.

• Gruel feeders: This type of feeder is commonly considered the fastest and best way to get problem fallback pigs eating and drinking properly after weaning.

• Nipple bars: This innovation provides an extra water source for pigs starting on wet/dry feeders. 

• Pulling pigs: Pigs that are falling behind in terms of weight or health are removed from their group and placed in the fallback pen, so they can receive more specialized care.

Multiple hand feedings are also being conducted several times per day in an effort to stimulate pigs and get them onto feed quickly. Drip valves with nozzles above the cup waterers are also helping to provide ample, cool and fresh water to pigs for the first few days after arrival.

Historically, ad-lib sow feeding — where, as the name implies, the sow can manage her own consumption — in lactation has been a successful tool for maximizing sow performance. Manufacturers are improving these feeders to make them easier to manage and utilizing sensors and electronic controls to monitor intake.

Farrowing crate flooring has also come a long way with cast iron and tribar. This modern flooring features larger, solid, flat surfaces (compared to woven wire), which provide better sow comfort.

LED lights have made a dramatic improvement to swine barn lighting in the last few years, saving electricity and providing a safe, well-lit environment for both pigs and herdsmen.

In addition, better transport trailers have been designed for pigs, which lowers stress while loading/unloading and during transport. They have improved ramps and doors, better airflow and floors for traction, are well-lit and have on-board cooling systems.

What management strategies are producers implementing to create the best environment for their pigs?

• Air filtration: Producers are investing in sow barn filtration technology, especially in moderately hog-dense areas. This has been helping to reduce the spread of disease.

• Ventilation: New control systems are available, which provide more information, are considered failsafe, and offer remote monitoring capabilities to ensure optimal environmental conditions.

  • There is also a trend of increasing ventilation rates when feeding high, lean, fast-growing genetics. Tunnel-ventilated barns are the most common type. These facilities utilize ceiling inlets and fans to create uniform air distribution to aid in cooling pigs down during warm weather.

These are just a few examples of the many ways that producers and industry experts are working to keep swine management practices up to date. Perhaps you found yourself nodding in agreement with the practices utilized on your farm or maybe you discovered some new ideas that might improve your operation. Animal husbandry is certainly fast-evolving and I expect this trend to continue for years to come.

Have a question or comment?

Excess weight may cause or predispose horses to problems like joint pain, laminitis and insulin resistance, or it may indicate an existing metabolic disorder. Nutritional management of the overweight horse is key – and not quite as simple as some may think.

At what weight is a horse overweight?

Assigning a specific weight to define obesity in horses is impossible due to differing bone structure and muscling. Instead, evaluating fat deposition over the horse’s body is a better method to estimate body condition. Body condition scoring (BCS) systems have been developed to apply a numerical score to the horse’s condition based on fat coverage over target areas of the body. While BCS systems are subjective, they do provide a systematic method for evaluating body condition. One of the most widely accepted scoring systems is the 1 to 9 Henneke scale, where 1 is extremely emaciated and 9 is very obese. Horses scoring above a 7 on this scale are considered overweight. For more information specific to body condition scoring, you may visit McCauley's dedicated page.

Why is the horse overweight?

Determining why the horse is overweight can be helpful. Sometimes the answer is as simple as the horse receiving feed when little or no feed is required. Unfortunately, the answer is often much more complicated. Metabolic disorders such as Cushing’s disease, insulin resistance and equine metabolic syndrome (EMS) may predispose the horse to obesity. Some horses carry extra weight simply because they are very efficient at converting dietary energy (calories) to fat.

Nutritional management of obese horses

Feed should be adjusted according to body condition and season. One of the primary keys to achieving desired body condition is to balance the number of calories consumed with the number of calories used. The number of calories used changes with age, climate and activity level. As a result, the calorie consumption will likely need to change throughout the year to maintain a healthy body condition. Warmer weather means less energy is used to maintain body temperature, and as pastures grow lush and calorie-rich, winter feeding quantities need to be decreased to maintain a healthy weight.  

If reducing or eliminating feed does not accomplish the desired weight loss, grazing on lush pastures should also be limited. This may be accomplished by splitting time between pasture and stall, using a grazing muzzle or placing the horse in a dry lot and feeding hay.

Pastures are often deficient in many trace minerals. A typical trace mineral salt block will not meet the horse’s mineral requirements. If the amount of feed provided is below the minimum requirement, then supplemental vitamins and minerals will be needed. In such cases, vitamin and mineral supplements should be fed daily rather than fed free-choice.

When feeding hay to overweight horses, choose mature grass hay. The more mature the hay at harvesting, the lower the digestible calories. Sugar and starch concentrations are usually lower as well. Many metabolic disorders require avoidance of sugars and starches, making mature grass hay the best choice for reducing calorie intake.

Horses on a hay-only diet should receive a minimum of approximately 1.5 to 2 percent of their body weight per day. Feeding hay at this rate is essential to maintain normal, healthy gut function and to avoid the development of vices like wood chewing. As always, the hay should be free of dust, mold and other contaminants.

Summary

• Use a body condition scoring system to evaluate the horse’s fat deposition.

• Reducing caloric intake and/or increasing caloric output is crucial to weight reduction.

• While calorie restriction is important, the other essential nutrients (e.g., protein, vitamins and minerals) cannot be ignored.

• For optimal health, the goal is to achieve and maintain the ideal body condition throughout the year. This may require fine-tuning the diet regularly to adjust for seasonality and other factors, such as changes in activity level.

Have a question or comment?