Nulo Puppy Food Grain Free Dry Food with BC30 Probiotic and DHA, Turkey & Sweat Potato or Salmon & Peas Recipe - 4.5, 11, or 24 lb Bag Grain-Free Recipe Contains No Corn; Wheat; Soy; White Potatoes; Tapioca; Artificial Colors, Flavorings Or Preservatives. Proudly Made In The Usa. High Meat/Low Carb Proprietary Formula 80% Animal-Based Protein For More Amino Acids And Better Flavor Using Fewer Carbs And Low Glycemic Ingredients Patented Bc30 Probiotic Supports Healthy Gut Flora To Aid Digestion. This Lactic-Acid Producing Bacteria Also Enhances Metabolism And Immune Response. Dha Helps Cognitive Development. Puppies Fed Dha-Supplemented Kibble Are Less Likely To Engage In Destructive Behaviors And Adjust Better To New Homes Calcium And Phosphorous Work To Grow The Structure Of The Skeletal System. They Help Bone Formation, Blood Coagulation And Nerve Impulse Transmission.