We currently have an 8yr Lab Maxx, 5yr old Pit Linus and 2yr old Pit Theo. My parents also have a 17yr old Beagle, LaVerne. All eat Bil-Jac everyday. All are rescues from our local shelter. I agree that, like people, not all dogs thrive on all foods-regardless of prices, ingredients, or cooking method. Over the years our dogs have come down with all manner of strange ailments and issues requiring vet care. Everytime we are asked by our wholistic, ancupuncturist vet about food, I reply Bil-Jac and he replies that it can't be the food thats the problem....and it never has been! I have used this food to help rehabilitate foster dogs suffering from demodex, of course in conjunction with proper vet care and medication. This food has kept and 8yr old Labrador with knee replacements able to hold his own on our daily walks with the MUCH younger Pit Bulls. Their coats are shiny and smooth. As far as stools go, Maxx gives me 4 well formed nuggets evenly spaced every day since he started on the food 7 years ago. Linus has never had any any digestive issues, other than eating grass! Theo is still a pup by Pit standards and he does have some loose stools here and there, due to the grass and bits of sidewalk concrete he likes to eat NOT his food!!! Bil-Jac is, in my opinion, tops for my dogs. It is properly cooked, uses human grade ingredients that address a dogs natural scavenging diet, and they LOVE it. As far as the preservatives in the food, nothing is perfect. Read the back of the box for everything you fed your jids today...wonder what you are feeding them? I bet there are as many if not More un-pronouncable ingredients in those products than in the dog food. Perspective is easily lost when we discuss a passionate subject as our beloved pets! God Bless all who care enough about the animals to be doing the research to come across this article....