I have a 1.5 yr old fixed male black lab. He is only about 50lbs and his ribs show. I can't get him to gain weight. Hes been dewormed and to the vet for his checkups. My vet has not given me any answers to my question WHY can't MY LAB GAIN WEIGHT?! I was wondering if anyone out there has any feed back for me. This is very frustrating for me because he has a self feeder and can eat whenever he wants. Could it be the brand of dog food I am feeding him? :confused: