We have dd1 and ds8. They fight. A lot.
Mostly because dd1 thinks everything is hers and decides ds8 can't touch it. Mum, the dog, the shopping trolley, her cot, a couch cushion etc.
It seems more to me than usually toddler tanties re sharing toys.
She scratches, bites, slaps and generally is awful to her brother. Even when he tries to give her a hug or help her pass a toy, sometimes he is just minding his own business and she will run up and hit him.
She does laugh and think he is hilarious. They dance together and she is happy to have him play with her. But she gets very possessive over strange things and he gets beaten in the process.
How do I stop it? I try moving her away and saying no. Ask her to be gentle and praise her when she is. We tried ignoring it and avoiding the situations bit it doesn't seem to make much difference.
I had them both in tears yesterday at the shops, cause dd1 got asked to stop slapping her bother when he came near the trolley and Ds8 didn't like that his sister doesn't like him and he gets hurt all the time.