The Black Stallion (1979) on Netflix

1946. While traveling with his card shark father aboard an ocean liner off the north coast of Africa, pre-teen Alec Ramsey becomes fascinated with a spirited wild black stallion being housed inside one of the upper decks. During a storm which claims the lives of many of those aboard including Alec's father, Alec is thrown overboard and eventually washes up on a deserted island along with the stallion. Although they initially treat each other with trepidation, Alec and the stallion, who he names Black, eventually form a symbiotic relationship and friendship. Alec credits Black with saving his life and keeping him alive. They are eventually rescued and brought back to Alec's home in the suburban United States. Alec quickly discovers that a suburban American backyard is no place to house a horse. By happenstance, Alec meets farmer Henry Dailey who offers to house Black for him. Alec learns that Henry was once a horse trainer and jockey. Together, they begin the improbable tasks of training Black to become a race horse and training Alec to be Black's jockey, all in an effort to show the world that Black could be the fastest race horse in the world, despite his wild upbringing. These goals are beyond their other obstacles, including Black having no official papers, and Mrs. Ramsey having to provide her consent for Alec to embark on this journey.