Today Royal Canin Sensitivity RD (duck and rice) was recalled affecting some of our pet owners. Besides the duck formulas recommended below, this one is similar to RD and may be a choice for your cat:

http://www.nutrience.com/english/cat/C-2150.html

We've used this with success, also. It does contain rice, however. Nutrience's open letter to customers about their products:

http://www.nutrience.com/english/news_update-Apr-07.html

...Pam