And this is from 2007. How much better do you think the testing is by now?
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http://www.bloodhorse.com/horse-raci...llision-course
Excerpt:
A Louisiana research project that shows racehorses can come into contact with drug residue just about anywhere on the backstretch has some horsemen calling for an end to “zero tolerance” drug-testing policies and creation of a national panel to examine data before inadvertent positives are called.
The study, presented by Dr. Steven Barker during the National Horsemen’s Benevolent and Protective Association Medication Committee meeting Feb. 9 in Hot Springs, Ark., revealed small quantities of six drugs were found in samples taken from ship-in stalls, the test barn, and pools of water at Louisiana racetracks. Even dust samples were tested and trace amounts of substances were found.
Barker, the chemist for the Louisiana State Racing Commission who plans to publish his findings, said small amounts of phenylbutazone, flunixin, naproxen, caffeine, furosemide, and cotinine, a metabolite of nicotine, were discovered in samples. Flunixin, a widely used non-steroidal anti-inflammatory drug, was the most prevalent, the study showed.
Some drugs were detected from just wiping the interior of stalls.