Churchill Downs has implemented measures to deter trainers from racing unsound horses after 12 horses suffered fatal injuries on the track within the past five weeks. The Kentucky Derby home will no longer offer incentives to trainers who start horses in races or pay purse money for first place through last place. Horses will be permitted to have only four starts during a rolling eight-week period, while those beaten by more than 12 lengths in five consecutive starts will be deemed ineligible to race until the equine medical director approves their return to racing. The formerly implemented policies were believed to have influenced the decision-making of horsemen.