I know this has been done a thousand times before but I'm really shocked and not sure how to deal with it. DS has always been kind and amenable. Since the new baby's arrival we've tried hard to make sure he gets lots of attention etc and he has always been very affectionate towards her. However, in the last few days he's pinched her twice and bitten her once. He says he doesn't like her sometimes, because she scratches him, and then tonight said he felt left out.
Clearly I'm going to have to supervise more closely - today he went and pinched her while she slept in her moses basket - but what do I do to try and resolve things, when will it get better and does it mean he's going to turn out to be psychotic?!