Title says it all really. DS is 5, 6 in May. Eats well, not fussy, loves his food really, but is very slim. Shoulder blades are pointy and sharp and you can see his ribs. He still has that 'little boy round belly' though, but then skinny little legs and arms. He eats cereal/porridge for breakfast, or 2 slices of toast, big packed lunch, then a snack after school, like fruit or malt loaf etc, then a big dinner, followed by yoghurt or rice pudding etc for afters. Big glasses of milk through the day too. All this and he looks like I don't feed him! DH says he was the same as a little boy, and the same til he was about 14. He says it's just how some kids are. Is he right? Should I be worried?
TIA