I am researching dog foods bc I recently read on dog food analysis that wellness at the bottom of the reviews said that they did retain some overall concern about the meat content. Which bothered me. So now I am totally confused

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there are a lot of dog foods that are good quality but the protein content is so much higher and the fat is as well.
My question is what is a good protein percentage and fat when looking for a dog food.
I also was wondering if I switched the protein source from chicken to fish would that be a bad thing. Gosh I sound like durrrrrrr and I feel durrrrrrr lol
I just want what is best for my Pixie and Daisy. I need some help!