Augie is working with his chemistry set when his friend, Philabert the mouse, comes out and asks for some cheese. When Philabert goes to get the cheese, a cat comes in and chases him. Doggie Daddy takes the cat out and Augie asks Philabert if he is okay Philabert tells him that he doesn't feel so well after being scared by the cat.
Augie shrinks himself to take care of his friend and Doggie Daddy does the same after seeing the miniature Augie. The cat comes back and starts to chase the miniature Doggie Daddy around. Doggie Daddy calls on Augie to help him and Augie gets to his chemistry set and drinks the formula to return to his regular
Augie tricks the cat into drinking the shrink formula and the cat shrinks while holding a firecracker and it explodes. Now Augie is miniature again and taking care of the cat and the mouse in the mouse hole.