Anakat, I have tried that in the past, and haven't found anyone who has liked it yet!!
Thanks everyone - I have had to let her go. She was even more dehydrated, her tummy felt worse, her bladder was feeling odd, so the vet suspected that this has brought on cystitis on top of everything else (she did have it last year), her chest was wheezy and she was clearly miserable - she didn't bite the vet. We had a very long conversation as to what to do with her next, the vet did say that with all the tests she has had in the past 2 years with no indication, it could indicate tumours. I could have had her referred to a specialist, and done loads of x-rays, scans etc, but I didn't think that was fair on her. We could have tried steroids, but the vet couldn't guarantee that they would do anything or if they did, for how long, and I didn't want to put her through anymore unless there were guarantees - and not just for this, but that this would be the final thing. The vet said that in light of how hard to treat PEbbles was (I got to read the notes from the e-vet - barely diagnosable without a sedation, cos I wasn't there) that she felt this was the best option, she had been miserable for too long, and the struggle with her legs was cos she was weak. RIP little one.
Out of the 6 cats I had here at the beginning of the year, only 3 are still alive, and only one is still with me, the other two are in new homes now, and Pebbles was the 7th cat I have lost in 4 years. It is getting harder and harder with each one as well.