People who live in glass houses department...

CNN says:

Tests have confirmed mad cow disease in a U.S. cow previously cleared of having the brain wasting illness, the Agriculture Department said Friday. It is the second case of mad cow disease in the United States.This animal was blocked from entering the food supply because of the firewalls we have in place. Americans have every reason to continue to be confident in the safety of our beef," he said.

US cattlemen favored harsh restrictions on importing beef from Canada when two infected cows were found there. They may react a little differently now that the shoe is on the other hoof.