We have two German Shepherd, one of which has an extremely sensitive digestive tract, something we learned VERY early on when everything she ate caused her grief. We were told by our vet that she needed to be on a food that contained only one protein and one carbohydrate and a form of probiotics if possible. Well after hours of research I found NutriSource Large Breed Lamb Meal & Rice Formula. It provides superior nutrition in a scientifically formulated easy-to-digest food. They use the finest ingredients including lamb meal as the primary source of protein and rice as the primary cereal carbohydrate ingredient to help maintain muscle mass and strength in large dogs. This food also does not contain corn, wheat or soy and has a probiotic in it as well. If you have a dog who does not tolerate high proteins in their diet and are looking for a food I highly recommend NutriSource.