She's still very thin and has slowed down a lot, but the palliative treatment seems to have had the desired effect. She's eating again regularly, meows in my face in the mornings to get her breakfast, and is much more lively. Dr. B said that this therapy has worked well before and can sometimes extend an animal's life for quite a while.
Anyway, we don't know of course, but she does seem much better. For a while there, I was giving her a poke every few hours to make sure she was still alive. But now she seems not only not distressed or in pain, but a little lively as well.
Thanks to all the nice people from all over who have sent little notes and emails. I really do appreciate them.