A dog's nutritional needs change a great deal from puppyhood to the senior years, and feeding a food made for the right life stage is one of the simplest ways to support long-term health.
Puppies grow quickly and need more calories and protein, plus minerals like calcium and phosphorus in the correct balance. Large-breed puppies in particular benefit from formulas designed for controlled, steady growth, which helps protect developing joints.
Adult dogs need a maintenance diet that keeps them at a healthy weight with steady energy. The right amount depends on their size, breed, activity level, and whether they have been neutered. Most quality adult foods print feeding guidelines on the package as a starting point.
Senior dogs often need fewer calories as they slow down, but they still need good-quality protein to maintain muscle. Many senior formulas add joint-supporting ingredients and are easier to digest.
Whenever you change foods, transition gradually over seven to ten days by mixing increasing amounts of the new food with the old. This reduces the chance of stomach upset. If your dog has a medical condition, ask your veterinarian which diet is most appropriate before switching.