I am late on this subject, and I do not intend to get it all fired up again, but wanted to give my 2 cents worth.
I totally agree with Leslie, that was beautifully said. I shudder when I see people buying Ol' Roy, or Come and Get it or Kibbles and Bits type foods but they are not letting them starve and love them enough to provide them with food and that is just as important. Not everyone can afford to buy the cadillac of pet foods like some of us can. But then again not everyone treats their dogs and cats like we do either!
I have tried many types of foods, finally settling of Royal Canin Holistic blend. Shaianne had sensitive bowels and stomach. We went thru gastritis and cholitis. The gastritis was worse I think b/c she vomited at least once or twice a day. Sometimes I would wake up in the morning and and find 4 piles of vomit on the floor. The vet said if we didn't get her cleared up we might have to put her on perscription food and we didn't want to do that. I finally found the holistic blend and we had great results, she stopped vomiting completely until about a month before she died, when I bought another kind of food and mixed in it with the R.C.
I have been trying to keep Keegan only on dry food, with occasional bil-jac (frozen) mixed in. Not often tho, I don't want her to get used to eating it with other things in it. Altho she does enjoy it when I mix green beans or chicken/beef broth in with it occasionally.

Incidently, I feed Kylie the R.C foods also. I tried switching her and she started vomiting also, so I am switching her back to the R.C. They came out with a new formula for indoor cats that is supposed to reduce litter box odors!
She really like the R.C food