I think I overreacted and he's doing well. More than well. He's aggressive, he's got a nasty temper right not because he's adjusting, and he eats like any other kid would.
I'll be taking him to the vet some time next week so I'll just have a professional double-check what I'm hoping to be what your advice suggested. He's probably very healthy and as long as the vet doesn't stick his/her hands near his head, they'll be fine too!