Hi everyone. My 12 month old ds has in the past couple of weeks started slapping me very hard, biting and headbutting. He's always been a biter but I think now he's doing it for attention as he waits for a reaction and laughs. Same with the slapping, headbutting and pulling hair. I say no in a firm tone without shouting and he thinks it's hilarious! He's always been such a timid, gentle soul so I don't know where this has come from! Is there anything I can do to stop it? I put him in his cot when he bites me whilst breastfeeding and he screams the house down but that hasn't taught him not to do it. He doesn't do it to anyone else either, just poor mummy :(