She had a funny turn last thing last night as I was about to turn in, and started attacking my hand ( tortitude!). She's done this occasionally before, and I just remove my hand until she calms down, but this time I let her get away with it, after the big and confusing day she'd had. She isn't breaking skin, it's just play, but I don't want to encourage the behaviour, as she may play rougher when she gets bigger.
So far this morning, she's completely back to normal.