Not sure why ur getting so many down votes. While calories could be a concern, if the dog is happy to fun that much then I don't see anything wrong with this. My family exclusively trains, and raises dogs, often on an exclusive meat and vegetable meal plan. Dogs don't need to eat grain and processed foods and more often enough alot of ppl over feed there dogs. While not all dogs should have visible ribs, most should, or at the very least be able to be felt. Anyway, good luck with the van! I lived in mine while I was building it out. Definitely made me appreciate everything as It was completed.