I have my cats on Performatrin Ultra Holistic.And they love it.I also noticed Casper very rarely hacks up a furball now.....
I am waiting for my pet supply store to bring in the canned ones.Which I have been waiting for some time now...
Here are the ingredients.
I get it from my Pet Valu
http://www.performatrinultra.com/cat/cdi_chicken.htm