Dixie does the same thing! When I leave for the day I leave her in her room with toys, a few hidden treats, food AND water. None of it is touched! Not even the toys. The minute I get home she is playing and dragging her toys around and eating her food.
I do think Dix sleeps most of the day. But it baffles me that she doesn't eat her treats!
Sorry I'm not much help, just wanted to let you know that I'm sort of in the same boat.
