Baby's New Formula

Mammy Two-Shoes threatens to throw Tom out of the house if he makes a mess. Jerry sees an opportunity to rid himself of his feline nemesis.

Tom is playing with Jerry when a cute lady cat is delivered to Mammy for her to take care of. Tom is smitten at first sight.

Tom subjects Jerry to his usual harassment; but the cat finds a new enemy, and the mouse finds a new friend, in the canary of the house.

Mammy Two-Shoes replaces Tom with a younger cat who is a lightning-quick mouser. Tom and Jerry form an alliance in order to get rid of this dangerous newcomer.

A hungry cat has the idea of giving "Jumbo Gro" fertilizer to a scrawny canary to make him a bigger meal, which leads to a race between the cat, the canary, a dog, and a mouse to see who can grow the biggest.

Jerry finds himself in charge of a foundling mouse called Nibbles, who is eager to steal milk from Tom's bowl and oblivious to the danger.