Eat food. Not too much. Mostly plants.
The Well winner? Out of 1000 entries...
Ate plants. A big heap. Still hungry.
(...via the Ethicurean in December, also see edible San Francisco's Pollan haiku which notably references offal meats).
And since I couldn't get enough, one last cat haiku in the traditional 17 syllable structure:
The food in my bowl
Is old, and more to the point
Contains no tuna.
(from a 2005 Haiku Slam reported on here in SFGate).