Whenever there is a change in herd productivity, including milk production or quality, or a herd health concern, it is a good idea to consider whether it could be related to the livestock feed. Researchers at Penn State University recommend testing for mycotoxins when unexplained herd health issues arise, particularly among large numbers of livestock. Testing should be considered especially if moldy feeds are being fed.
These university reports provide more information about molds and mycotoxins, their impact on livestock health and productivity, and what situations warrant action.
Mold and Mycotoxin Problems in Livestock Feeding (Pennsylvania State University)
Mold and Mycotoxin Issues in Dairy Cattle: Effects, Prevention and Treatment (North Carolina State University Extension)