I've never been recommended a food for my cats by any vet I've gone to. The tech always asks me what I'm feeding. I tell them and they say, I've NEVER heard of that food! Yeah, I knorw, let's move on, LOL. They ask me how to spell it, I do and its on to the next subject. When I got my first cat I asked them what to feed, they said, whatever. I then asked them to give me a guidelines of a good food. Eh, anything. I realized my vet wasnt the one to ask about food from then on.
The only time I took a vets suggestions is when my dog was vomiting 4 times a week and losing weight They put him on a fish and potato diet. Cone to find he can't tolerate fish :/ when he went in for a check, they said, well we put you on a prescriptions diet but for SOME reason, you took him off. That's the only time i all but yelled at my vet that it made him a million times worse and he was vomiting 7 times a week not only 4. They said I should have come back for another prescription, sorry, not paying $30 for 5 lbs of food yeah, never taking their suggestions again