There are decades of work published on isolating and determining mycotoxins in animal feed including cattle The specific method depends on the toxin and the feed type. So do a search in the literature on the topic of interest and you will be overwhelmed with information.
Due to the seriousness of mycotoxins on animals and consumer health, since ancient mycotoxins have been isolated and diagnosed there are many books and research in this areaالسموم الفطرية أو سموم الأعفان - الأمراض الفطرية التي تصيب المزروعات ...
بواسطة إسماعيل خليل إبراهيم ،الاستاذ الدكتور) This is one of the sources you can see and learn how to diagnose and isolate.
By processing during fermentation (silage) from selecting quality feed ingredients. During fermentation, it should meet the ideal moisture content and should be anaerobic to prevent the formation of fungi/molds.