This review is for the senior formula. I have a 9 year old Welsh Springer and a 10 year old Shepherd mix. They were on this for a while, and I noticed that their coats dulled, and they had alot of gas. After switching them to a combination of Merrick canned and Orijen Senior dry, I noticed HUGE improvements both in coat and in energy. The gas situation improved, and so did their bad breath. I believe that the Blue Buffalo line is quality, but for my dogs I feel that the protein in this food is too low at 18%. Not every food is for every dog.