I've been under the impression for some time that Purina is the most nutritious cat food of the inexpensive varieties available on the market. After reading a few posts on this forum, I've come to question my assumption. I wonder if I've come prey to mere marketing, and if anyone has any thoughts on the matter. I want to give my cat the best, but I don't want it to cost a lot. Am I right or wrong to be feeding him Purina Cat Chow? What should I be looking for in choosing the right food for Arthur? He seems healthy enough now, but I realize I should consider the long term effects. He is young, only four years old, so if a change needs to be made, I think it would still be appropriate to implement one now.