The California Horse Racing Board (CHRB) said Nov. 4 all urine and blood samples collected from horses in the Breeders’ Cup World Championships Nov. 1-2 at Santa Anita Park, in Arcadia, Calif., have tested negative.

Testing was performed at the Kenneth L. Maddy Equine Analytical Laboratory at the University of California, Davis.

Under standard protocol in California, all horses that raced in the Breeders’ Cup were pre-race tested for TCO2 levels in blood. Post-racing tests were performed on urine and blood samples from the first four finishers in all 14 Cup races; additional horses were tested randomly at the discretion of the stewards.

As reported earlier by Rick Arthur, DVM, equine medical director for the CHRB, out-of-competition tests on 25% of the horses pre-entered in the Breeders’ Cup also tested clean

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