I'm sorry that Olivia's not improving

I know you're doing all you can and it must be so frustrating.

We have an electric heat pad under the cushion in our cat bed. It might be useful to help keep Olivia warm on cold nights. It's about half an inch thick and has a heating element inside it that provides a low, slow kind of warmth. The cord is coated in thick plastic so it's chew-proof and runs on very little electricity. It's made in Australia so the brand won't help you, but a large pet supply or a shop that deals in pet/human arthritis might have something similar? Hope this helps.