A horse died ahead of Saturday's Preakness Stakes, as well Nine horses have now died at the famed Churchill Downs since April 27.
Swanson Lake, a horse trained by Mike McCarthy, suffered an inoperable leg injury after finishing fourth in her race at the Louisville track.
The horse was vanned off the track before doctors opted to euthanize her
From April 27 to the Kentucky Derby on May 6, seven horses died from either injuries or collapsing on the track. Two of those horses died in the undercard of the Derby, and another one, Wild on Ice, was supposed to run in the race that was won by Mage.