I vaguely remember looking at the Special Kitty ingredients, and it is crap. Junk food at best, which I'm sure a lot of cats may like, but not healthy. I *think* Walmart also carries Iams, it's not great, but it's healthier.
Surprisingly enough, the ingredients list from the Kirkland brand of pet foods (Costco brand) was pretty good. Maybe Sam's Club has a similar self-branded product?