but it is a really sad situation all round. I was just thinking that maybe you could get a couple of plug ins that give off the pheromones that calm cats down. I am just battling to remember the name right now, but any vet or good pet shop will know. They calm the cat and also you could put some Rescue Remedy drops onto wet food - and mix it in, that should help

Are there any long-term plans for the poor cat? She can't live like this forever.

You are doing a great job, well done!