You can check out reviews of it at
Dog Food Reviews - All Products - Powered by ReviewPost If you scroll down you can read the explanation of why each food is graded the way it is.
Remember that this website offers only opinions and you should do your own research and make your own choices. Bottom line -- feed what's best for you and your dog. As for me personally, I like to grade my food the same way as DFA does and we fed 5-6 star foods when we fed kibble.