This July, 2012, photo provided by the U.S. Department of Agriculture, Trade and Consumer Protection, shows cows with ear tags at a dairy farm in Lake Mills, Wis. The federal governmen

 

              This July, 2012, photo provided by the U.S. Department of Agriculture, Trade and Consumer Protection, shows cows with ear tags at a dairy farm in Lake Mills, Wis.  The federal governmen
This July, 2012, photo provided by the U.S. Department of Agriculture, Trade and Consumer Protection, shows cows with ear tags at a dairy farm in Lake Mills, Wis. The federal government has launched a new livestock identification program to help agriculture officials to quickly track livestock in cases of disease. In most cases, farmers and ranchers are likely to use ear tags that assign a number to each animal. (AP Photo/U.S. Department of Agriculture, Laurie Lawrence)