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 LOUISVILLE, Ky. (AP) - Thoroughbred racing is joining the crackdown on drug cheats. The 20 horses expected to start in Saturday's Kentucky Derby will be scrutinized for illegal substances as much if not more so than their human counterparts in other sports.
All horses at the Derby will undergo pre-race blood tests for alkalizing agents called "milkshakes" that help alleviate fatigue, and then a "super test" to screen post-race urine samples, which can detect about 140 different drugs.
The second test will also be used at the two other Triple Crown races, the Preakness and Belmont Stakes. It was administered at last year's Breeders' Cup. No horse tested positive.
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