The production of mycotoxins due to the presence of moulds in feed puts livestock at risk of mycotoxicosis. Mycotoxins are metabolites produced by mould in mould contaminated raw materials and feeds. These metabolites are toxic, causing mycotoxicosis in livestock when absorbed into the body. Effective mycotoxin binders will bind the mycotoxins in the gut of the animal thus preventing absorption into the body. In order to minimize the risk of mycotoxicosis, microbiological control is of utmost importance. This control starts at harvesting, since severe contamination can take place even before the grain reaches the silo. Precautions should thus be taken against moulds at an early stage, in this way preventing mycotoxins from being produced. If no mould is present, no mycotoxins can be produced.