Katie, I'm so sorry to hear this. I don't think that I could take this kind of behavior either. I'm sorry to hear that even prozac didn't work for her because I've heard so many great things about it. Right now both Starr and Storm are on a generic form of prozac to help calm them down because Storm was attacking Starr and this was causing Starr to start pooping outside of the litter box again. So far it's working out great for them and they're both much calmer.

I know that you said that you've tried different litters but have you tried Cat Attract Litter? You can buy it at Petsmart and it also comes with a booklet inside of it with coupons and great ideas about how to deal with behavioral issues in cats. I hope that you'll be able to find a solution soon. Good luck.