This Food and Drug Administration (FDA) rule forbids adding mammalian protein into ruminant animal feed to prevent Bovine Spongiform Encephalopathy (BSE), a neurologic disease, from re-occurring. Ruminant animals include cows, sheep, and goats (U.S. Food and Drug Administration (FAD), 2016; SubstancesProhibited from Use in Animal Food or Feed, 2016).