Correspondence issued by the Government Accountability Office with an abstract that begins "In 1997, the Food and Drug Administration (FDA) banned the use of most proteins derived from mammals (referred to as prohibited material) in feed intended for cattle and other ruminants. The feed-ban rule is one of the primary actions taken by the federal government to protect U.S. cattle from bovine spongiform encephalopathy (BSE), commonly known as mad cow disease, which is believed to be spread through feed that contains malformed protein found in certain tissue--particularly brain and central nervous system tissue--of BSE-infected animals. Earlier this year, mad cow disease was found for the first time in a 12-year old animal born and raised in t...