My ds2 (2 yrs old on thursday) is a real sweetie but has this rather terrible habit of biting everybody when he doesn't get what he wants. He's bitten me, even managed to draw blood when biting his older brother and has already bitten children in nursery on 3 occasions. I'm at my wits end! No idea where he gets it from. We have told him off numerous time, made him apologise and cuddle people afterwards. Even tried "the naughty step" approach. But nothing seems to work