Lend a Paw (1941)

Winter. Pluto is sniffing around outside when he hears a noise. It's coming from a bag floating on an ice floe in a creek. Pluto rescues it, then loses interest when it turns out to be a kitten. But the kitten follows him home, and Mickey takes a liking to it, to Pluto's disgust. Pluto's devil and angel sides give him conflicting advice. Pluto puts the cat up to mischief, but Bianca the goldfish fingers Pluto as the real culprit, getting him thrown outside. The kitten falls into a well, and the angel beats up the devil, convincing Pluto to save the kitten.