Koda is a Bull Mastiff, Bull Arab, Rottweiler cross. We were told by a vet that he would be surprised if she was able to walk by the age of two because she has such severe hip problems and he said she wasn't a candidate for surgery because of this. She was 9 months old and we were devastated as we lost our shepherd suddenly from illness months before, and Koda was by our side through the whole ordeal. After many tears, we did research, tried a couple of foods and Black Hawk was the answer. I'm happy to say, our beautiful gal is almost three and is able to move freely. Thank you so much for your wonderful product.