I need some guidance. I took Bakker into vet for rabies shot and Dr. J commented on his bad breath. He also pointed out swollen gums and I mentioned the "gas". Plus Bakker always smells-I can't pinpoint any particular odor but its there!! He is thinking he might be having an allergic reaction to the cat food. Even though he is only 5 1/2 months he would not yet kitten food when I got him so he is eating the purina cat chow with the others. I do not know what he was being feed at the rescue-with so many cats I'm sure it wasn't anything special. The vet said to try Eukanuba or science diet. I picked a small trial bag of iams kitten food up and also the Eukanuba kitten. He did not want either one which is odd as I can buy any time of wet food and he will eat it!!. I also need to switch the others off of Purina cat chow anyway as Ox need to go on a senior cat food and Grizzly on a food for overweight kitties. That however does not solve my initial question of what to try. So many of us cat owners try lots of different food. Perhaps anyone with experience could provide advice????