McKade's unproportional

I am always joking that McKade looks like he has a big head. We found out at the doctor today that his head is not big for his age, it is right at the 50% mark. The problem is that his body length is in the 25% and his weight, at a whopping 18 lbs., is less than 5%. No wonder his head looks large on his little body. He must have a lot of brains in that head of his. We were told that we could add fat to his food (maybe a little more butter on those mashed potatoes.) If you have ever seen him eat you would know that getting him to eat is not the problem, he just doesn't put on weight. This seems to be a problem with everyone in our family. At some point maybe the docs will realize our kids are just small due to genetics and not to anything else:).