Post by Lance Donckers on Sept 27, 2012 12:55:36 GMT -5
I found this on Wikipedia.
Various breeds used include mountain ponies from the Himalayas, Manipur ponies from Assam, Arabians and the ever-popular Thoroughbred and its crosses. In the United States, Thoroughbreds and Quarter Horses are often crossed to produce polo ponies, while in recent years crosses of Thoroughbreds and Criollo horses from Argentina have become popular. In Australia, Australian Stock Horses are the most common breed used in polo. During the early 20th century in the United States, a polo breed association was formed with a stud book. The principal foundation sires were Thoroughbred race horses of small stature. In 2012 an International registry, the Polobred Studbook & Breeders Association Polobred.com, was founded to record the pedigrees of Polo Playing Horses with the aim of developing the Polobred Horse.