My kid likes to hit his mother

I have a one and 4 months yo boy. He is usually super sweet and calm and we have never really had any trouble with him. However his behaviour is changing.Lately he doesnt want to eat anything, not even what he used to like. Also he has like a problem with his mom because eventhough i dont spend as much time with him, he seems to prefer me, AMD whenever im around he hits his mother. We tell him know and even try to give him slaps in the hands butter he laughs, so we dont really know how to stop him doing that.This makes my wife kinda depressed since she sometimes think he hates her ir something.Do you have any advice in correcting his behaviour towardars eating and the hitting? via /r/Parenting http://ift.tt/2iavqop