Uno has chicken allergies, and I have found that California Natural has been the best, although someone mentioned that they had been changing their formulas, I had not heard that. I also work for an all cat hospital and IVD carries plenty of allergy diets-Lamb and Rice, Duck and green pea, Rabbit and green pea, Fish and rice and Venison and Potato. Science Diet also carries Z/d which is supposed to be an allergy diet as well. I would not recommend the Z/D as several clients have been calling lately stating that their cats will no longer eat the food, it smells bad and their cats have diarrhea, now keep in mind these are all cats that have been on this for a while now and just recieved new bags of food. Not sure what that is about, but we have left messages for our Science Diet representative, no call back yet.