How can I make him loose weight?

My little 8 year old brother is 120 pounds and only 4'4" he is really fat and stunted and he won't exercise or eat diet food. His doctor doesn't seem to care...she says most americans are like that and they will grow out of it. He eats a lot of chicken and ham and cheese sandwiches...he drinks a lot of juice and soda. He doesn't eat mcdonalds or fast food...because we rarely eat out. We do eat a lot of home cooking because my mom thinks its better. He loves chicken especially bbq type chicken, he once ate 8 drumsticks. His proportions are abnormal. But when we try to control it he won't eat at all...he just starves himself. Its so weird. What do I do?

How can I make him loose weight?
Post Opinion