Hi Shasta-
I also wish there was a cat food advisory site as great as this dog food one! But I agree with the others, a good dog food brand is most likely also good place to start with cats. Since you are not opposed to using Diamond brands, Kirkland Signature at Costco is very similar to the Diamond Naturals and Chicken Soup at an even more affordable price. I rotate between Wellness Core, Earthborn Primitive, and Taste of the Wild dry for mine. I also use various canned foods such as: Chicken Soup, Nutro, Friskies, and Authority. Also importantly, try to stay away from fish based kibble and canned food. It contains a lot of iodine which could later lead to hyperthyroidism. As mentioned above, catinfo dot org is a great site for cat nutrition and health issues. It does have a few charts with a lot of data on numerous brands of canned cat foods. Good luck!
