I remember when I was a little kid - 6 or 7 - I would put a bit of catnip on cat food to get our kitty to eat. (This was wet food, and it had BEGUN to dry...and my mom stopped me when she saw what I was doing! )

If he likes catnip, maybe it would give him the munchies? Just a thought.

(BTW - my childhood trick worked - Ginger DID begin to eat the food. But was stopped by Mom! LOL)