Powerful Antioxidant & Mushroom Blend Formula

VetClassics CAS Options Immune Support features natural ingredients to help maintain a healthy immune system in dogs and cats. 

CAS Options Immune Support utilizes Reishi, Maitake, Shiitake and Turkey Tail mushrooms along with a variety of antioxidants to support your pets immune system strength. VetClassics is a trusted brand formulated by veterinarians and backed by the National Animal Supplement Council.