My dogs love this food, and are very healthy in every aspect because of it. In addition to the dry food, I feed my dogs real fruit/veggies, chicken and eggs. I don't usually feed my dogs anything I wouldn't eat with a few exceptions. As far as the Nutro Ultra food goes, my dogs coats are very shiny, they have tons of energy, a consistant weight, they shed way less, and I have not had to bring them to a vet for anything but required shots. They have all been tested for heartworms and have tested negative everytime, and I have never used heartworm preventative. This food along with other things keeps a dog very healthy.