Top your dog's kibble with raw. Instinct Raw Boost Mixers Immune Health provides natural antioxidants - Selenium and Vitamins A & E to help maintain a healthy immune system. Cage-free chicken is combined with vibrant, functional, whole-food ingredients - 100% freeze-dried and bursting with flavor and nutrition. Raw, whole-food ingredients are freeze-dried to gently remove the moisture and lock in nutrients & flavor. Raw Boost Mixers are made in the USA with the finest ingredients from around the world. They are made without grain, corn, wheat, soy, potato, artificial flavors or preservatives.