Peabody's Improbable History (1959)

Peabody. who happens to be a dog, is the smartest being in existence. He has accomplished many things in his life as a business magnate, inventor, scientist, Nobel laureate, gourmand, and two-time Olympic medalist. Peabody becomes sad and lonely and decides to adopt his own human son. In an alley, he meets Sherman, a bespectacled, red-haired boy. After saving Sherman from a group of bullies, Peabody discovers that Sherman is an orphan and decides to adopt him.