I would def have him vet checked...that's a lot of food ..my guy is 8 lbs and gets 1/4 c am and pm mixed with a few bits of family food (scrambled egg/chicken, etc) and we're having trouble keeping his weight DOWN!!! He's on a low calorie kibble-..we're trying diff low calorie brands. He had been vomiting every morning until we switched to the latest food, (Bil Jac reduced fat dry food) so the fact that yr dog is losing weight is worrisome .
