I'm sorry hun.. Miss Cleo is a gorgeous lady. I know it may not help, but if you can find some Rescue Remedy made by Bach's, it may help her be able to calm down and relax. It's just flower essences and very safe. I've used it on a few rats who had chronic lung problems and would have panic attacks because they didn't think they could breathe.

Do you have pictures of her of how you remember her(the real Cleo)? I know how it can be when you don't feel that they are there anymore. It's almost a comfort though, knowing they may already be happy and playing again somewhere.