Let's face it, three hours is an eternity between meals, and what more wholesome between-meals snack than one's own flesh? For starters, I suggest the hands, an all-natural source of lean protein that's always within easy reach.
Hands look a bit like starfish to me, so I'm confident that any finger I nibble off will regrow like a starfish arm. If not, no big loss; the grownups bring me everything with their own hands and I don't see that ever changing.
The only obstacle I see are these mittens the grownups insist I wear; mismatched mittens at that. Two weeks in and they've already given up on matching my accessories. It's going to be a long year for them.