Well said Jordan. My parents' dogs are both on a "low quality" food - Star does well on it, Wilbur has a greasy coat and chronic ear troubles which I think would probably clear up on a better diet. (I don't know this for sure, but he's regularly vetted and we haven't found any other problems that would contribute to this)

Jasper does well on a mixture of Canidae and raw. He doesn't handle extremely high protien foods like Innova very well, but I know tons of dogs who do fabulously on Innova.

Lots of research combined with trial and error is an excellent way to find the diet that works best for you and your dog. Since good nutrition is absolutely key to having a healthy body, I think it's definitely worth worrying about.