Come Back, My Pet

A pet's owner is so angry at it that he abandons it. But soon he falls into trouble (usually literally, e.g. into a pit) and his pet saves him, naturally regaining his love. Usually the pet in question will forgive them and return home.

Compare with Timmy in A Well, Androcles Lion, and Tropey Come Home.

Needs a Better Description

Comic Books

 * A Goof Troop comic in which Pete replaces his dog with a cardboard robot guard dog after their house gets robbed. Turns out "Card" is actually programmed to let its creator in to rob the house again.

Film

 * In Lilo and Stitch, Lilo tells Stitch to go away after she discovers that he's an alien, and that he's the reason that they were being pursued by Jumba and Pleakley. Right after, however, she gets captured by Gantu, and Stitch rescues her.

Literature

 * In the Hans Christian Andersen tale "The Nightingale", the Emperor of China tames a nightingale, but neglects it in favor of a clockwork bird. When Death comes for the Emperor, it is the live Nightingale who charms the Grim Reaper with his sweet song.

Western Animation

 * Courage the Cowardly Dog: Courage routinely does this for Eustace, who routinely scares and abuses him. However, it's less out of the goodness of his heart and more because of his devotion for Eustace's wife Muriel.
 * In a Tom and Jerry cartoon, Tom's owner gets annoyed that Tom never tries to catch Jerry anymore so replaces him with a robot mouse catcher and Tom is kicked out. Since Jerry can't live in the house due to the robot throwing him out he and Tom work together and eventually the robot goes wild and Tom rescues his owner.