The typical old-style Percheron (Percheron postier) was a grey harness horse which was from 15.2 to 16 hands high, and was famous for his very useful ability to trot fast and long, with a heavy load behind him.
    The breed's history is obscure and difficult to trace. It has been generally accepted that the Cayuse Indian Pony descended from the French-Norman horses imported into Canada in the 1600s. Most of these French horses were Percherons, which the Canadians used to improve their domestic breeds. The Percheron was a good choice -- it continues to be one of the only work horses which can easily trot for extended periods of time.

 Years later, the French Canadians brought their horses into what is now American territory. It was recorded that they bartered their horses in St. Louis with the Pawnee Indians, who then took them further west. Eventually, the Indians crossed their sturdy French horses with the lighter Spanish Barbs to produce a horse which had not only speed, but endurance.

 By the 1800s, the Cayuse Indian Pony had become a separate breed. The Cayuse Indians, known throughout the Northwest for their expert horsemanship, continued to develop this French-Spanish Barb strain through selective breeding. Because the French horse had the ability to pass on its tendency for spots or a profusion of white markings, the Cayuse Indians were able to produce some very colorful horses. In fact, the Appaloosa, Paint and Pinto breeds have all been influenced by the blood of the Cayuse Indian Pony.