My brothers dog is a lab/boxer mix and he is very skinny I can go and count every single one of his ribs, he does have worms and he will be treated for that but could that be why he's so skinny, you can see his spine and his sides are really sunk in. Its not that he doesn't eat enough he eat as much as my dog yet is much skinnier. When I tell my brother he needs medical attention my brother claims he's skinny because of the boxer in him. Do you think this is the reason, or is it a medical issue? Could it be from the worms?