OIRA met with animal feed associations and cattle associations from both the U.S. and Canada to discuss substances prohibited in animal feed. Loopholes in the mad cow disease regulations allow cow parts to be fed back to cows in animal feed products, thereby potentially spreading the disease among cows. This meeting is one of several recently held by OIRA on mad cow-related topics. The agency also recently met with industry over substances prohibited in human food products as well as on the prohibition of specified-risk materials.