Ron was a race horse trainer who worked with both Thoroughbreds and American Quarter Horses. Gray is also found among Welsh Ponies, Thoroughbreds, and American Quarter Horses. Thoroughbreds, Harness, Hurdles and Greyhounds. The horses have proportionally shorter legs than Thoroughbreds, and longer bodies. Sometimes purebred horses are incorrectly or inaccurately called "thoroughbreds". Mortality rates were eight times higher for thoroughbreds than standardbreds, and highest amongst young horses. Marwari horses are also used to play polo, sometimes playing against Thoroughbreds. Juan added additional bloodlines including the Welsh Pony, Shetland pony, and small Thoroughbreds. Winx is a bay mare bred in Australia by John Camilleri's Fairway Thoroughbreds. Juan added additional bloodlines, including the Welsh Pony, Shetland pony, and small Thoroughbreds. True roan has not been satisfactorily identified in Arabians or Thoroughbreds. A racetrack for thoroughbreds was built and their owners established the Dallas Jockey Club. Baldelli is a horse owner with an interest in breeding and racing Thoroughbreds. Breeding thoroughbreds for racing is a Bluegrass specialty. They are descended from thoroughbreds, morgans, and extinct breeds.