I have tried several different cat foods and this one seems to be the best.  I have used Whiskas, Diamond, other Purinas, to many to count. The cats kept getting sick off the stuff, they would be throwing up with in minutes. With the complete formula no more sickness cats seem happier and its mostly a chicken product, by product but still chicken. Better than a lot of the stuff thats based on corn. Purinas done a really good job with this one