PRO PLAN Puppy – now with OptiStart®! Your puppy has just one year to develop the three protective systems- The immune system, the digestive system, and the skin and coat system. These three systems work both, independently and together, to help ensure a lifetime of optimal health and protection. That’s why Purina veterinarians and nutritionists have developed New Purina PRO PLAN Puppy with OptiStart®. It is specially formulated with an innovative blend of nutrients, including Colostrum, that's rich in natural antibodies. So, you can give your puppy optimal nutrition and natural protection to unleash his full potential. ABOUT THE BRAND: Pro Plan® distinguished itself as the first and only full line life-stage specialty pet food to use real chicken as the #1 ingredient. At Pro Plan®, our mission is to do more to help enhance the lives of pets and their owners. One way we approach that goal is by providing an array of highly nutritious, premium quality products that are specially formulated to suit the nutritional needs of dogs and cats. We use real meat, poultry, or fish as our #1 ingredient in dry dog and cat food formulas. Many of our products contain high protein levels and vital antioxidant blends that exceed levels required for complete and balanced nutrition. *Any feeding guide is exactly that – a guide – as energy requirements can vary up or down by 25 percent depending on the life stage, coat type, body conformation, age, environmental factors and activity levels. The days per bag of food has been calculated from the manufacturers feeding guide for the animal stated.