OxyNu Canine Allergy Relief for large sized dogs (50-75 lbs) is designed to protect your dog’s health by strengthening his or her immune system to protect from common allergy symptoms using a specially formulated all-natural dog mineral supplement. With our proprietary blend of minerals, OxyNu Canine’s Allergy Relief supplements works to fill any voids in your dog’s diet to keep him or her strong and healthy during allergy season.