Thanks for the responses.
Unfortunately it doesn't look like a good outcome. We have been feeding her by hand, mashed up Hills AD via a syringe, she eats it this way, but she won't eat anything by herself. We think she's given up as she spends most of the day hiding somewhere inaccessible, like...
My mum's cat has an **urgent problem**. She's 15 years old and in good health. But recently had two teeth removed.
This went well, the vet gave her some other tests at the same time & reported her to be in very good health for her age. However on her return she refused to eat and only drank...