Home in Indiana (1944)

After he is sent to the Indiana countryside to live with his aunt and his hard-drinking Uncle Thunder (Walter Brennan), troubled teen Sparke Thornton (Lon McCallister) begins skipping school to learn to race horses at a neighboring ranch. When Thunder, a retired breeder, finds out Sparke is spending time with his former partner, Godaw Boole (Charles Dingle), he forbids him to continue. Sparke struggles to follow his new passion against Thunder's wishes, and schemes to reignite his uncle's equestrian interests.