DS1 is 3.6 and normally a really delightful and kind child. He has just bitten DS2 on the thigh hard enough to leave purple toothmarks in a red blotch ... I am gobsmacked by this behaviour. It's totally out of character. I am at a loss as to what consequence is appropriate and commensurate as I am feeling so upset with him I can't figure out what to do next! He is crying at the top of the stairs and I am feeding DS2 and trying to ignore him. At the moment I have put him to bed without reading his story/stroking his back/singing a lullaby and said his friends can't come tomorrow as planned. Is this too much/not enough? Bizarre and totally out of the blue...DS2 is 4 mts so its not like he could have provoked it... Baffled [confused] [shock] [sad]