Do vets do drug tests on horses at the races?
Yes, the horses are drug-tested, but not by vets. The procedure for drug testing is mandated by the state racing commissions rules of racing. For example, in California, where I live, the California Horse Racing Board (CHRB) covers drug testing and medication regulation in Article 15 of the Rules of Racing: http://www.chrb.ca.gov/query_rules_and_r… Pick out the relevant section you want to review and click on it, it will open up in .pdf format. Some states mandate PRE-race testing, which may be done by a vet. This is an attempt to prevent horses that may be in violation of state drug rules from starting in a race, the thought being that if you can identify horses that are in violation and prevent them fr