Lisa127- I have had nothing but crappy experiences with Purina. It has corn as a major ingredient I beleive, and that bites.
Try looking for something with no corn or by products. I believe IAMS and/or Science Diet is sold at the grocery store. They would be the best I think if you must buy from there.
B.A.R.F. Diet is something I have looked into quite a bit. But she is basically on that already. LOL. She gets all meat and veggie table scraps in the house.
Thanks for all the replies people.