I would be surprised if he didn't get nutrients from his food... he's on Taste of the Wild Salmon, + Salmon Oil + 1 packet Fortiflora, with Alaska Naturals Salmon for treats and occasional Lava Lake Lamb treats. He is every other day on Temaril-P, a very small dosage for his rhinitis-like allergies. Almost daily he gets a few frozen cranberries, or blueberries, or pieces of banana, a tidbit of clarified butter, a bite of raw ground bison, or wild rose berries directly from bushes outside (he loves them!). I would think that would all be balanced.
Also he does not eat his own feces, only other dogs', and not all. Maybe that's not important since he does it anyways?
~ Malik, GSD, 10.5 yrs old