Feeding animals high rates of forage is an opportunity that many farms should consider. Those diets aim to take advantage of the cow’s biological ability to convert ingested fibre into high value products such as milk or meat. Both the quality and quantity of supplied forage are closely related to milk production, production costs and farms profits. In some herds, the process required to implement the model may take years because of the changes to be carried out in the productive structure of the farm.