Prevalence
The Appaloosa horse is the breed best known for the leopard complex patterns, though the complex characterizes the Pony of the Americas, Colorado Ranger, Tiger Horse, British Spotted Pony and the Knabstrupper breeds. The gene is also relatively common in the Miniature horse and Falabella breeds, the Spanish Mustang, the Noriker and the related South German Coldblood. The existence of leopard-spotted coats among Asian breeds such as the Karabair and Mongolian Altai has been recorded since ancient times, and suggests that the gene is very old. Leopard complex patterns exist in very low frequencies among American Quarter Horses, Connemaras and Welsh Ponies.
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