The Sheriff's Son is a young anthropomorphic dog.
The son of the Sheriff of Heela City, this stubborn pup somehow ended up stuck on a ruined wagon with no guardian in sight in the desert near the town. Willful and with a surprisingly commanding voice, the boy was found by Oswald Rabbit who tried to care for him, only for him to bring the (wanted) Oswald to his father.
Behind the scenes
The Sheriff's Son appears in the 1930 cartoon Hell's Heels.
He is a parody of the orphaned baby from the novel Three Godfathers, on which Hell's Heels is based.
As the entire cast for Hell's Heels is lost to time, is is unknown who voiced the Sheriff's Son (though for humor's sake it was clearly an adult man).