Good point Judy, the nutrition standards are constantly changing. I personally had two cats go blind back in the 60's, probably due to the lack of Taurine. The complete & balanced diet, how can packaged kibble, nothing like what they really should eat, give them full nutrition? Has any else noticed that sometime when you buy cat food, you get a bag that makes your cats sick? My daughter has opened bags that have smelled exceptionally bad before.