Thanks for the info. I don't think slowing down my dog's eating behavior would work and the Victor kibble is so small for a large dog, being close to the size of a pencil eraser. I called Diamond and they said the kibble size of the extreme athlete is about the diameter of a dime and about two dimes thick, which would have a larger surface area. I don't know why the trend has been to go to smaller and smaller kibble sizes with large breed dog foods. The other kibble I feed is an average, grain free food, pea and fish protein based food, so the rice in the Diamond would compensate for lack of grain and the pea protein. I also found it close by at TSC. I know Diamond has had at least three recalls, but I would think that might be an advantage in that, in order to stay in business, their QC would have to be very good. I used their product in the past and was satisfied, but stopped after the first recall. I can't see paying $55-$60 for 30 pounds of kibble and would rather use that money to buy real food.