I have just gone through this with DS1 (aged 5). Apparently all kids go through a hormone surge at this age which can affect their moods so we explained this to him, and that he might find it hard sometimes but6 it is ok to be angry just not ok to hit his siblings. We also got called into the school about his behaviour there so between school and home we formulated a plan of watching for his anger starting to show, and giving him a chance to vocalise what was going on. He started hitting cushions instead of his brothers, which was great, and now will tell us if we have upset him (by telling him off) instead of just screaming so that we can talk about the situation.

We also linked his pocketmoney to behaviour at school and home, and pushed back his bedtime from 7.30 - 8, to 7ish. All things combined we got our lovely boy back within a month or so and hopefully he has some coping mechanisms in place for the future too.

I hope some of what we did helps your daughter, best of luck

T
xx