Please remember that the link you listed describing the value of the various dog foods is
only based on the opinions of those who run the site and take that for what it is worth. All commercial dog foods have fillers and realistically, the order in which they appear in the ingredients means NOTHING. Regardless to which food he is content with, make sure that you are supplementing the diet as needed to ensure he is getting any nutrients and vitamins that the food does not provide.