OverviewInspired by a dog’s natural instinct to choose nutrient-dense foods, our nutritionists formulated Purina ONE SmartBlend True Instinct with high quality ingredients to provide the protein and energy active adults dogs need. No matter how far science advances us, we always look to nature to inspire us. Purina ONE® SmartBlend® True Instinct was created to deliver on a dog’s natural instinct to choose nutrient-dense foods. Our Grain-Free Formula, made with real chicken as the number one ingredient, has been developed without corn, wheat, or soy to provide a grain-free option that contains the protein and energy active dogs need. Nature plus Science helps provide 100% complete and balanced nutrition to support whole body health while satisfying your active adult dog’s true instinct.