Levels in the total diet of mature, nonbreeding horses should not exceed the levels shown in Table 4. Analyze the feed for mycotoxins often. Controlled scientific studies are needed to clarify specific mycotoxin tolerance and toxicity levels. Heat stress, marginal nutrient plane, crowding, disease exposure, the presence of more than one mycotoxin, and drug interactions, as well other factors, increase animals' susceptibility to mycotoxins. Thus these recommendations must be tempered with knowledge of the animals involved.
Additional research is needed to clarify the effects of mycotoxins on horses.
Until such data exist, caution should be taken to select and feed mold-free grains and forages.