That is to say, not how often should he eat but how long can he go without food without needing veterinary intervention. We are on a trip and my 11lbs intact Jack Russell is a little out of his element and is not interested in his food for 2 days. I would just get wet food but he doesn't like it at all because it gets his face wet. I can't leave his food out all day either because we are camping and that's just asking for insects and animals to eat it. He's drinking water fine and has had a couple people food items, but not very much at all. Some pieces of melon and a couple crackers. Thanks!