About a year ago I did some pretty exhaustive research on pet foods, their processing and how that effects what products one should choose for their pets. Since then, I've searched around and tried out a few, and here is a short list of some foods that your local pet suppliers or veterinarian may carry:
I had her on Natural Balance when she was a kitten (under a year; though they're always kittens to their daddys). Not too long after she turned a year old, my local PetCo started carrying Pet Promise, and at the sales person's recommendation (on natural/organic pet foods) I got some for 'Boo to give a try. Well, she's taken to it like a fly to honey, a wolf to bunny, and a golddigger to money. I've even munched a few pieces myself and found it oddly tasty (not nearly enough dried meat nuggets made for human consumption). Since I'd seen Castor & Pollux Organix, I'd wanted to give it a try, but being the most expensive of the three (~$18 for 6lbs) I figured I'd stick with the Pet Promise and DVP (both roughly six-dollars cheaper).
I've found all the products above at my local PetCo store. I'm sure any other well stocked pet shops would carry at least one or two of these as well. And of course, don't forget your local organic pet suppliers.