The Devil Horse

In 1874 Montana, Native Americans attack a group of settlers, leaving a young Dave Carson (Yakima Canutt) and a colt named Rex as the only survivors. Years later, Carson is recaptured by Indians who force him to fight their vicious devil horse, Rex, which bears a striking resemblance to its earlier self. The two later grow up, with Rex becoming a stallion who tramples Indians to death and forming an unbreakable bond with Carson.