I know my younger DD is horrid without enough sleep, so maybe a little extra sleep might help your daughter? A good nights sleep is important, I know I get a little cranky without a decent sleep!

My 6 yo DD goes to bed around 8pm and I always have to wake her up - 7am when I have to go to work and around 7.45am on a non-work day.

Good luck and hope she gets that extra sleep.