Three horses purchased by leading buyer Michael Gill at the Ocala Breeders' Sales Co.'s select sale of 2-year-olds in training have been returned because of possible unsoundness. The trio includes a son of Silver Charm bought for $360,000 and two horses Gill purchased for five-figures. OBS general manager Tom Ventura said from 3% to 10% of horses sold are typically returned after a sale held. Unlike some sales companies, OBS does not require X-rays to be placed in a sales repository. Buyers at an OBS sale receive a "bone warranty" instead, which Ventura said is designed to "increase the action in the ring."We think there is a two-way benefit [to the bone warranty]," Ventura said. "It allows buyers to bid on the spur of the moment if they see a horse in the ring that they found interesting and is now in their price range, they can bid without having to worry about what's in the repository. That took the action out of the ring."If Mike Gill goes to the repository and looks at the top 20 horses but not the 25th," Ventura continued. "Now he will be more willing to raise his hand for the horse not in his top 20."In returning a horse a buyer must submit information on the reason to OBS, which is reviewed by the consignor. If the consignor's veterinarian disagrees with the claim, a panel of three independent veterinarians enlisted by the company makes the final decision.The Silver Charm colt, a $75,000 Keeneland September yearling, drew a buzz from buyers with a swift breeze during the under-tack show. He is out of the Storm Bird mare Secret Harbor and was consigned by Hartley/De Renzo Thoroughbreds. Ventura said the colt was gladly accepted back by his consignor. Dean De Renzo was not immediately available for comment Wednesday.