I know I'm asking a lot of health questions, but I've never owned a large to giant dog before. We've always used blue wilderness for all our small to medium dogs, and it wasn't too expensive because they didn't eat as much as Nala does. We had her on that for a while, that's what she was on before we got her, but we're needing to switch her to a less expensive brand. I've heard a lot of good things about Nutro, what do you think of this dog food? And do the feeding guidelines look right?