Chalk both mine up to Nutro Natural Choice Lamb and Rice. Lightning gets the "lite" version. He eats very fast and seems to poop a lot. I'm working on slowing down his eating to see if that helps. Stomps also gets a can of Mighty Dog with each meal because he won't eat otherwise (believe it or not, the vet said feed him whatever he will eat). Both my dogs don't have stomach or skin problems and don't (in my opinion) stink. Some might argue that point in regards to Stomps though. As far as price, I know I don't pay as much as $40/bag, but I can't remember how much I do pay.