FeedMe is a simple addon for those hunters that forget to feed their pets.  It displays a small window with the pet's name and hunger.

There is no configuration interface for it, but it supports several slash commands and is easily dragged around the screen.

Currently is shows the pet's hunger as "Well Fed", "Hungry", or "Starving". "Starving" seemed about right given how cranky and useless an unhappy pet is
Click the "Details" button to also show the pet's current experience, experience needed to level, experience as a percentage, and current level.
Click the "Target" button to show the name of the pet's current target.

THIS ADDON IS WOTLK READY!