My dog,cole, is skinny. I've tried everything to bulk him up.I changed food,went on the raw for a bit but he's a picky eater and will not eat alot. I have him now on Natural Balance lamb and rice formula,he likes it and will eat it everytime but he will not clean his bowl completely. I give him about 4 and a half to 5 cups aday and I say he eats only 2 to 3 cups out of it. You can feel his spine and the top of his hips very easy. I'm thinking of getting nutracal and give him that is there anything else I can do? He's alittle over a year and a half and weights 65 lbs.