Yup, that is right. There are evolution based diets for pets. Do you think people will use them if they don't believe in evolution? Do pets believe in evolution? Is an evolution based diet better than other diets? Actually, for the last question, it seems plausible that evolution informed diets could be of some use, but still seems funny to see it in pet food.
Why isn't there an evolution diet for people yet? Oh wait, there is.
And there is all sorts of stuff out there about evolution and diet including