Free YOOS Essential Oil Dog CollarGet a free Free YOOS Essential Oil Dog Collar. The YOOS collar is the first and only essential oil collar for dogs to help relieve occasional joint stiffness and maintain joint mobility. The YOOS collar utilizes essential oils.  The oils are absorbed into the body when the collar comes in contact with the skin, and has a soothing action. The collar is available in 2 sizes for all dogs. The collar you’ll receive will be based on your dog’s weight. No purchase required, no credit card required. Valid for US residents only.