Hill's® Science Diet® Puppy Small & Toy Breed dog food provides precisely balanced nutrition to meet your small breed dog's special needs. It contains high levels of antioxidants to help build a healthy immune system with appropriate levels of calcium and protein to promote healthy bones, muscles, and teeth. It also contains natural DHA from premium fish oil, a nutrient vital to promote brain development and highly digestible carbohydrates and proteins to ensure optimal nutrient absorption.