Sand (1949)

A show horseman, Jeff Keane (Mark Stevens), loses his prize stallion, Jubilee (Sun's Red Shadow), as a result of a train wreck in Colorado, and enlists the aid of rancher Joan Hartley (Colleen Gray) in tracking the horse. Jubilee responds wildly to freedom and presents problems to those who capture and treat it badly. By the time Jeff locates Jubilee there is the fear it may have turned killer.