What did you find out?
When the Mad Cow scare hit Canada about 2 years ago I remember one of the experts saying that there are so many downer cows that it takes a long time to test them all. Sounds like if there are regulations they aren't very good. Downer cows are ones that can't even stand up on their own because of broken legs and other causes. They have to travel all that way on broken legs -- not good.