When I was little, we used to feed Cat Chow. Our cats were all very healthy too, until they got urinary crystals.
Meow Mix is also EXTREMELY high in fat.
Feeding a higher quality food is cheaper in the long run, because they eat less of it. It also promotes overall health so that vet costs are lower in the long run. Also, cats who eat a good quality food will absorb WAY more nutrients, therefore pooping less - makes for a much nicer litter box experience.
I feed Chicken Soup. It's a very good quality food that isn't as expensive as some other ones. I have known some people to experience very smelly feces with it though, so I think it really depends on the cat. My two do great on it. I like how it doesn't have a bunch of useless fibre and filler, like most "low" grade foods have.
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