We have a 10 month old Irish Wolfhound - we started him on the Kirkland (which the breeder recommended, but gave him loose stools). After some research, we switched him to Innova Giant Breed Puppy food. He loves it. He actually eats less of it than the Kirkland as it has more protein. Granted, its expensive, but a purebreed IW is worth it, IMHO. (BTW, I actually found a pet food delivery service that with the delivery fee, costs less than the pet store to have the food delivered to the front door - about $59, incl. tax and del. fee)