Was having some issues keeping weight on a couple dogs, fed the same amount they look much better. Good stools, energy and coats look better. They weren't doing bad on PPP 30/20 by any means, just liking the results of the Inukshuk. I've heard similar results from other trialers as well. Overall, I think it is more digestible, so more nutrient absorption and they the additional calories. But due to Purina's support and availability I would never shy away from using it, still a high quality feed.