This Wednesday, April 25, 2012 photo shows a herd of cows in DeWitt, Neb. The beef industry responded swiftly after the first new case of mad cow disease was found in the U.S. since 2006. With billions of dollars at risk, the USDA and other government officials quickly explained that consumers were never at risk because none of the animals meat was bound for the food supply. (AP Photo/Nati Harnik)