I agree our food is not great either, but many studies have been done on humans to determine what they need. I can't imagine what we eat or feed other people is nearly as bad when no studies are being done on cats to figure out what they need.My thoughts may not be all that popular. I been thinking about what I was feeding my cats, what I feed myself as well. Our food supply isn't much better than theirs with pink slime and all.
Some balance about it all, a little of each thing. I can't say all or none is best on any of the theories on here. All raw, some raw, all wet, no grain, some kibbles, no kibbles.
Just keep reading labels and sort through it. Offer fresh meat and see what the cat says about it.
I had one cat who loved pizza. Not much, she just had a few nibbles. But loved pizza night. Did it do her any good? Probably not. But she enjoyed it, that is all that matters. You can't keep them from dying. Just make their trip a little bit happier.
This site did help me a great deal. I say, through good times and/or bad, stick with this place. Keep talking, you will be the greatest cat care person you can be.
Whether you should feed some kibbles or not depends on the cat. There are cats who refuse to eat anything else. Same goes for raw food. A cat might like raw food, but not at every meal. You have to feed the cat what it wants - but always be aware it is possible to eat too much tuna and salmon, which many cats love.