Well, Kit-n-Kaboodle is the worst brand name dry food on the market so I certainly wasn't suggesting it!
Just mentioning it as one of the Purina brands. And, yeah, regular Cat Chow does have dyes but not as much as say, dry Friskies or Meow Mix. And Cat Chow Naturals has no food dyes at all and has meat as the first ingredient, which is why I recommend it.
Canned Friskies has some coloring agents but only Salmon flavor has FD&C numbered dyes (which are the really bad ones). So I don't feed salmon flavor.
Do you know of ANY feed stores in your area? Stores that only sell animal food? They really have the best selection and prices. Like I said, I really don't know what to suggest if nothing agrees with your pets. What foods have you tried that did agree with them and didn't cost too much? Go back to those.
I buy canned Friskies from here: http://www.doggiefood.com/frisies-canned-classic-pate-supreme-supper-13oz.html
With the 15% discount (not just for new members; once you make an account they e-mail the coupon codes all the time) it comes to about 94 cents a can. Which is the same as Walmart's price but sometimes Walmart doesn't have enough on the shelf.