Whether they're working or competing, hunting or herding, every active dog faces unique challenges. Help him meet those challenges with targeted nutrition from the Pro Plan SPORT line. This concentrated nutrition helps optimize oxygen metabolixm (VO2 Max) for increased endurance. The amino acids help nourish muscles including the crucial time immediately following exercise. Feeding Guideliens: 3-12 lbs ; 1/3 - 1 cup13-20 lbs ; 1 - 1-1/3 cups21-35 lbs ; 1-1/3 - 2 cups36-50 lbs ; 2 - 2-1/4 cups51-75 lbs ; 2-1/4 - 3 cups76-100 lbs ; 3 - 3-2/3 cupsOver 100 lbs ; 3-2/3 cups plus 1/4 cup for each 10 lbs of body weight over 100 lbsWe recommend that you keep your dog in ideal body condition and not allow your dog to become overweight. The exact amount of food your dog requires will need to be adjusted according to age, activity and environment. But a good place to start is with these guidelines for an average, active, adult dog fed once daily. Making the Switch to Pro Plan: Although you'll be anxious to see the difference Pro Plan can make in your dog, please allow 7-10 days to ease the transition from your dog's current food. Each day, simply feed a little less of the previous food and a little more Pro Plan until you're feeding Pro Plan exclusively. This gradual transition will help avoid dietary upsets. Provide adequate fresh water in a clean container daily. For your pet's health, see your veterinarian regularly. | Purina Pro Plan Performance 30/20 for Canine Athletes Salmon and Rice Formula, All Ages, Dry Dog Food | Size 33 lbs