Jim Davis must find the idea of inanimate objects yodeling intrinsically funny. As an improbable image it works much better here than it did last time, though compared to what used to go down in Pee-Wee Herman's fridge, yodeling baloney is nothin'. It's always been a running gag that the Arbuckle refrigerator is a museum of horrors. I don't know that it jibes with Garfield's tendency to eat anything, including raw pancake mix and bottles of condiments, but it allows a lot of good jokes about the behavior of bachelor slobs.
Though Garfield and Jon are both ineffectual in their own ways, the performances demonstrate the great comic divide between them, even in attitudes toward cleaning the fridge. Neurotic, easily frazzled Jon looks so shell shocked he's not going to be able to confront the mess by himself. Garfield lounges in his most blatantly worthless signature posture. Normally Garfield posed on his back like this is reserved for gags about his laziness. At it's heart, that's what this is: though the rancid food situation has gotten well out of hand, he suggests procrastinating... for no reason. The usual excuse for procrastinating is that a problem will solve itself, or at least not worsen. Garfield fully acknowledges that the olives already have eyeballs in them, and will further mutate. And he just doesn't want to get up.
Fine. That's Garfield. Why does he care if Jon wants to clean the fridge himself? As long as you're going to try to be worthless as possible, the only way to truly achieve the goal is to drag someone down with you.