Thank you Motherless - from the bottom of my heart.
Kitty is OK so far, I went to see her last night and she nibbled a little food, but then unfortunately my regular vet had a caretaker keep an eye on her overnight and for whatever reason the caretaker did not understand that she should be fed, so they didn't give her anything to eat!
For older cats, prolonged fasting is DANGEROUS. I called in the early a.m. to see how well she'd rested and if she was eating normally, and found out that she hadn't had any chance to eat normally or otherwise, and went flaming in with cat food in a Baggie... long story short, she ate some for me, and when the regular vet opened shop, they were appalled that she had been fasted overnight. I'm going back tonight and feed her again, she perks up when I'm there. She will definitely be fed overnight tonight.
She has to stay in hospital for a few days, then I'll bring her home and board my kitten, so that the older cat doesn't get chased around and end up jumping up, etc., which she definitely shouldn't do right now.
A lot to think about, a lot to take care of, but I have hopes that she'll come through it all OK. And that I will too...
Thank you kindly for starting a thread, I'm deeply, deeply touched by your caring and concern.