The Three Outcasts

After young Dick Martin's father dies, his mother marries Rance Slavin, with whom Dick does not get along. Years later, after his mother has died, Dick buys his own horse ranch. He discovers one day that his horses are being stolen in large numbers, and sets out to find the thief and get his horses back. However, he is in for a surprise when he finally discovers the identity of the horse thief. - IMDb