 Mycotoxins are secondary metabolites produced by fungi, especially those belonging to the genus Aspergillus, Penicillum, and Fusarium. These toxins can contaminate agricultural commodities in the field or during storage if conditions are favorable for fungal growth. Five mycotoxins, aflatoxins, deoxynevolinol, zeeralinone, humanicins, and acrytoxin A, are covered by EU legislation, but low-level contamination by Fusarium toxins is very common, with deoxynevolinol found in more than 50% of samples. Multi-mycotoxin studies reported that more than one mycotoxin was present in 75% to 100% of the samples, which could impact animal health at low doses. Co-occurrence of mycotoxins is likely due to simultaneous production by fungi, contamination by multiple fungi, and completed feed made from various commodities. The paper reviews data published since 2004 on the contamination of animal feed with singular combinations of mycotoxins and highlights the occurrence of co-contaminations. This article was authored by Isabelle P. Oswald, Olivier Pule, Yuliana Aperdo, and others. We are article.tv, links in the description below.