I'm having behavioural issues with my17 month old DD and I'm hopingsomeone can help. She's always been very naughty and will deliberatelydo things that she knows are not allowed. But recently she's gottenvery aggressive partucularly towards my nephew who's 3 months olderthan her. She started biting him at any opportunity she gets andsometimes for no particular reason, he will just walk past her andshe'll grab his arm and bite him. If I see her about to do it I'll willstop her and now she's taken to biting herself instead, so hard thatshe's leaving red bite marks up her arm. She will also hit him veryhard with toys and pinch him although it's the biting that's morefrequent.
I've recently had another baby who is 12 weeks old and I know that herbehaviour has gotten worse since my son was born (she's also bitten hima few times) but I'm not sure how to stop it. In the past I've triedto use positive reinforcement and will distract her from what ever itis that she's doing but this isn't working at all. I've now taken togiving her a smack (which I said I'd never do!) but she doesn't seem tocare when I give her a smack.
I've started her in daycare once a week because I think she's gettingbored at home and needing to burn off more energy than I can burn athome. So far they've said that she's been very good a day care but I'mso scared of her biting another child.
Any tips on ways I can deal with this?