DD, 2 1/2 goes to a childminder 2 mornings a week, since about 3 months ago. One day she's there with the minder and her own daughter who's 2 months older than dd. They get on fantastically. The other morning they're joined by a boy 1 month older than dd. He's really a very difficult child although not in any way unpleasant. He's, apparently, borderline ADHD and can get easily aggressive. Dd's come home now a couple of times with bites on her arms and I witnessed him scratch her face very badly this morning. His mum is clearly stressed out by his behaviour and seems very nice (I don't know her beyond occasional meetings as we cross paths or at a toddler group). She's a friend of the minder which makes things a bit difficult.
What should i do? I've been thinking of maybe dropping the second morning dd goes to the minder as I don't really want her to be physically hurt and from what she says she really is being bothered by the boy and isn't enjoying the time there. I have a real job to get her to leave home to go there on the day he's there, whereas the other day she's dancing out the door before I'm half dressed! But I don't want to upset the minder or the mother of the little boy. The childminder herself is new to minding and is 10 years younger than me so doesn't have a whole history of experience to help her deal with his behaviour although she is aware of it and is doing, I think, her best in terms of disciplining him.
Any ideas? What would you do?