Blue Blood

Tim, an old race-horse trainer down on his luck, is thumbing his way from San Francisco to Los Angeles when he is given a ride by Eileen and Sue Buchanan, daughters of a wealthy Southen California race horse breeder. Tim sees "Tanglefoot", a five-year-old he had trained, and learns that the horse is destined for the dog meat packers. Eileen buys the horse with him. (imdb)