In Europe, the sharp decrease in cases of transmissible spongiform encephalopathies (TSEs) has led to an easing of the restrictions on the use of products of animal origin in the feed of food-producing species. In the expert appraisal it recently published, ANSES concluded that ruminant fat, gelatine and collagen should only be used in certain conditions, in order to guarantee the absence of any risk of transmitting TSEs.