I can tell you this, I fed nature's variety instinct kibble for the past year, and it's the best kibble I ever fed. However, Machobear still locked his paws raw. I changed to the exact same feed but with freeze dried raw, and with just that tiny bit of raw, all food allergies disappeared. And the coats are fantastic. As far as fertility is concerned, with the kibble on its own, I took machobear to the clinic to freeze semen, and all I got was 10 straws. After 3 months of the same kibble with freeze dried raw, I took him to get drawn, and he gave me 17 straws. Just imagine if I gave complete raw? There is no argument here. The proof is in the pudding, NO KIBBLE CAN COMPETE WITH RAW. PERIOD. Like I've said though, if you must feed kibble, feed Natures Variety Instinct with Freeze dried boost.