The Black Stallion (1980)

Young Alec (Kelly Reno) is left stranded alone on an island after a shipwreck. His only companion is 'The Black', a wild Arabian stallion who helps the boy to survive until they are both rescued. Back in the States, the horse and its inseparable friend are taken under the wing of trainer Henry Dailey (Mickey Rooney), who convinces them they can triumph in horseracing's most prestigious meeting.