I think some of theese replies are a bit extreeme. He isnt a psychopath, i know that for a fact. He doesnt have a black heart because he does care. He has never attacked me, because deep down he knows he shouldent. About attacking his sibling's, that is different.
Psychopaths have no feeling's though. I got my son a dog when he was 7. He loves it to death. No matter where he is, he will always come home to walk her and he always feed's her. He even sometimes wrestles with her, and embraces her. I always thought it was a bit wierd. I am guessing because animals can not talk so they cant be judgemental.
My son isnt crazy, i know that for a fact. He is sane.