Thank you Penny, Dita and Andere and LK. Trixie is remarkably intelligent about her own condition, I think. She has had to endure it for seven annual seasons now, but in her first year, she was in the foster home and semi-captivity. There was no chance to pick up the mites if she was not in the open.
The past week was a really scabby one and she was fed-up and over-grooming unsurprisingly. I was not making great efforts to put stuff on her, but observing how she was. I don't think it reached big stress levels because she still wanted cuddles and long sleeps with me in the recliner. Crucial not to lose her trust by fussing. She made up her own mind to stay in all yesterday and last night and this morning and, unbelievably, seemed to want a litter tray. I keep one just in case, with a bag of litter, thank goodness.
But just before I went to get it, she was taken short, poor Trixie, and literally, it was in the bathroom. Never happened before and I blame myself for not opening the door quicker. The tray was used in the night and she is still interested in it. She is sleeping again now, scabbiness much reduced. More later.