Dude,I forgot to say that he is violent toward himself as well. Hitting himself in the head, biting himself and cutting his hair off once. He also puts himself down, just like your daughter. Mostly though it is taking it out on us. He is not too bad to his brother anymore. He used to be, to the point that I didn't want to leave them alone in fear of him snapping. I think he feels so close to his brother now that he is a bit older. He is his best friend.