My English Bulldogs have never refused food-I would worry if they did. Has he possibly eaten something that he shouldn't have? Socks, or toy parts? I am sure your vet will suggest something for you. Is he pooping normally?Yes, I see you said he is. You could try giving him some Pepto Bismol, or a pepcid-perhaps he has a tummy ache. I would take him to the vet if you can today-just to be sure. Hope it is nothing to worry about!