Be Human (1936)

Betty Boop is incensed when she sees the farmer next door whipping his defenseless dog. She chides him via song to 'Be Human,' but her plea only spurs him to punch his cow, beat his chicken and whip his horse. Betty calls Professor Grampy at the Animal Aid Society to come to the rescue. Grampy speeds over in his paddy wagon with a contraption that captures the farmer and holds him until Grampy can bring him back to his place. There, Grampy drops the farmer onto a treadmill in his basement. A mechanical arms whips the deserving brute as he tries to run away. Meanwhile, the treadmill powers Grampy's own farm, which has a variety of inventions designed to feed and pamper the animals.