Each US Nutra-Nuggets formula is scientifically formulated to ensure it contains the proper amount of vitamins and minerals to help maintain proper weight, energy levels and long-term health at specific life stages or activity levels. Nutra-Nuggets US even offers a grain-free formulation that is great for dogs of all ages, from puppy to senior age. Whether you have a new puppy or kitten, lap dog or working dog, active cat or older cat, Nutra-Nuggets has a formula designed to meet your pet’s needs.