So sorry to hear about your kitty. I really hope the therapy works for her. I recently did some research on cat nutrition and boy was that an eye opener! I switched my cat to a premium wet food Natural Balance immediately. She went after this like she had been waiting for it all her life. She loves the Ultra formula and also the Venison with peas and Duck with Peas. I buy this at Petco. Although she hasn't had any health problems, I have noticed a distinct difference in her general vitality and coat condition. Here's a link to reading about obligate carnivores and the benefits of a raw diet. Although I don't go to the lengths that some might go to, I can honestly say it's been a change for the better.
http://www.rawfedcats.org/