Seven racehorses, including 2004 Golden Gate Breeders' Cup Handicap (gr. III) winner Tronare, 2004 Snow Chief Stakes winner Cheiron, and 2003 Forerunner Stakes winner Californian, have been supplemented to the catalogue for the Barretts October mixed sale. All seven will be offered on the first day of the two-day auction, which is scheduled for Monday, Oct. 25, and Tuesday, Oct. 26, in the Hinds Pavilion at Fairplex Park in Southern California. Sessions begin each day at 11 a.m. PDT.The seven racehorses will be consigned by trainer Kristin Mulhall, agent, to dissolve a partnership. Pedigrees and past performances of these horses can be viewed soon at www.barretts.com.