It is a common misconception that, due to the anatomy of ruminants, mycotoxins may have a diminished effect on the health and production of cattle. The more we learn about mycotoxins, however, the more we realise that this is not the case. A modern dairy cow’s intake will far outweigh any ability of its rumen environment to inactivate and denature the mycotoxins it consumes. Additionally, some mycotoxins can directly affect microbes and their environments. A rumen microbe will not have time to act before another load of mycotoxins is ingested.

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