The Pony of Americas is a new breed of horses. Ponies are good with children, and are a perfect choice for young riders. It is a cross between a Shetland stallion and an Apalloosa mare. The crossbreeding took place in the 1950s in the United States. This little horse has a round body, deep chest, clearly defined legs, and Arab-type head. Ponies are 46 to 56 inches high in maturity.