Dude there are 6 Garfield strips that explain Garfield is actually an abandoned cat dying alone of starvation in an apartment and all the food and friends are in their head.
UR JOKING
This is a series of Halloween strips Jim Davis wrote and illustrated because he wanted to be legitimately scary instead of just “Halloween scary,” he had since clarified that the “abandoned home” scenario is not intended to be the canonical reality of the Garfield universe, it’s a terrifying fantasy Garfield is experiencing only to return to the true reality of Jon and Odie and all his friends with a new appreciation for them