well, I buy my meat from a slaughter yard, so we generally know what is in it, plus we also get calls for cows horses etc that have gone down, which we will collect slaughter and bleed ourselves, but the meat goes to our puppies never anywhere near our race dogs, simply because in a last ditch effort farmers will give cows a massive shot of penicillin (procain) just to see if it can get threw it, same as in milk, milking cows are given penicillian every 5 weeks just to make sure they have no infections, so if you buy milk from a dairy you should always ask when they are given their shots, it is easy to be caught out if you arent careful