Yes, large breed dogs – like your one – really deserve something special: more protein rich food, more micronutrients. Several manufactures focus on dog food for large breed. They have special product line for big dogs. Our dog Taz reviewed several ones, so you can see and pick the best one also for your dog.
List of large breed dog food reviews (best first)
… we are working on more grain free product reviews. We are adding new one every week.