U.S. rules frustrate rising demand for bison. A restriction that was put in place when mad cow disease was discovered in cattle three years ago is frustrating bison producers in Canada. [News Source]

BSE likely came from feed (Iowa Farmer) OTTAWA (AP) -- An Alberta, Canada, dairy cow that was diagnosed last month with BSE (mad-cow disease) probably contracted the disease from contaminated feed, federal regulators said. [News Source]