Its a pretty decent food. I feed it to Karma for her kibble but I give her Welness Wet food. I can't afford the really good kibble so I comprimised and give her a really good wet that I can afford. So far she seems to be doing really good with this system.
Just a thought, but do you have access to Chicken Soup? Or perhaps Diamond Naturals(not sure if there's a senior formula in that)? Both are good & relatively cheap. I figured prices & the Diamond Naturals is much cheaper for me for the farm cats than Purina Naturals.....and better IMO.
IMO Purina Naturals is not a very good food for the cost. They charge a lot because they put the word "Naturals" on it but in reality it does not have very good ingredients. I think you can find a much higher quality better food for the same amount of money.