Is it the same DC that you used for the girls?

Not to jump to conclusions.... But if it is, do you think there could be a carer there they don't like?
Reason I say is my boys went to a DC/preschool and LOVED it. Every day was "Is it a preschool day?" We use to spend heaps of time there just because they liked it so much. Then we moved away, 1 started big school & The younger started at the little mobile preschool close to home. But then as big school approached for him I started taking him back down the the original place as they had a proper "pre" school programme in place. He HATED it. He was good to start with but by a month or so into it it was a fight to get him out of the car to go in.
When I asked him why he didn't want to go, It was the new director he didn't like. All the other carers where the same as before. But the original owner had come back & taken an active role in the centre & it was her that he didn't like. She was over bearing, in his face "grandma, pinch your cheeks" over the top. So I stopped taking him there. We returned to the mobile preschool where funny enough the director was the old director of the original preschool. He was happy, enjoyed his last term before big school & that was that.

So I just wonder, seems your DD got weird in the last 6 months of her stay there, Maybe there is "new" person there that's just too in their face & they don't like?