tennessee walking horse-my dad owned one, the breed is known for their unique four-beat "running walk."
Tennessee Walking Horse - The breed was originally bred in the Southern United States to carry the owners of plantations around their lands. They are known for their unique four-beat "running walk." The breed is rarely seen in any of the sport horse disciplines; however, they are popular in trail riding because of their smooth gaits, stamina and easy temper. They are also seen in Western riding disciplines and in harness. (Wikipedia)