What to do when they hit each other?

[Samiamnot]

I have a 3.5 year old and a 2 year old. Both girls. Sometimes they play together so beautifully, which is just a treat. But other times, mostly when they're tired, they can be vicious to each other. Pulling hair, hitting repeatedly, snatching etc. I think it's all typical behaviour of siblings but I'd really appreciate some help with how to manage it. Should we discipline when it happens, what's is a suitable consequence for this age for physical aggression?

Any experiences and ideas welcome!

Bump

At this age I would

1. Look out for the signs and try and anticipate any lashing out.
2. If it happens intervene immediately and very sternly remind them “no hurting” “we do not hurt each other”. Tone of voice is important, You need to shock them but without screeching.
3. They have to apologise.
4. Separate them until they have calmed down.

I work in a nursery, that would be our approach.