My 9 year old boy is 4"3 and weighs 5 stone 8lbs, i've noticed he seems quite a bit plumper than he used to and when he was with some of his schoolfriends he looked quite a bit plumper than them too. he's always eaten a lot in comparison with other kids his age too. Anyway, is he overweight, and if he is, should I do anything ? :)