Hi Tom and Nickie- This is only a guess based on what I know about how Dr. Mike and all the editors rate dog food, but I’m going to say it’s because the grain-free Duck has a high content of meat based protein. The first 3 main ingredients when I looked at the BJ’s website were: Deboned Duck, Turkey Meal, Chicken Meal. The first 2 ingredients in the Chicken and Rice were whole meats or meat meals followed by a grain (Rice). Dr. Mike states in the reviews that because of a canines carnivorus bias they favor foods with a higher meat content. I would 100% agree with that. Judging by the look of the ingredients by themselves I would have to choose the GF Duck over the Chicken, also because my boy has messy poo’s with grain inclusive foods.
Hope this helped some!
