They recovered fine from the bald patches.
But I lost one about 2 weeks later. We had been away for the weekend and when I got back and looked in the cage one was laid out on the shelf, so I picked her up and she was floppy. I stroked her a few times but she went stiff in my hand.
The other girl, Wendy, is doing great, she is still an indoor chippy due to having babies outside. Hoping to move her outside in the next few weeks. She finally seems to have grown to adult size. The only complaint I have with her is getting her back in her cage after a run round.