After numerous foods, we opted for Blue Buffalo fish and sweet potato available at petsmart. Jonah did nutro ultra for large breed puppies first with good results. changed him over at about 8 months to Blue. No problems at all now!
Until Dakota was a year old, we had him on Blue Large Breed Puppy Food. He never had a problem. He is now on Kirkland Signiture Lamb and Rice from Costco--which is actually an even higher rated food than Blue but they don't have large breed puppy food.
Diane (and Dakota)