Investigators tentatively traced the first U.S. cow with mad cow disease to Canada, which could help determine the scope of the outbreak and might even limit the economic damage to the American beef industry. Dr. Ron DeHaven, the Agriculture Department's chief veterinarian, said on Saturday that Canadian officials provided records indicating the sick Holstein was in a herd of 74 cattle shipped from Alberta, Canada, into this country in August 2001 at Eastport, Idaho.
Yahoo! News December 27, 2003
BBC News December 27, 2003
New York Times December 28, 2003