Jowl Straps are crossed underneath the horse’s head and after passing through a ring are connected to the reins. Brief pressure on one rein pushes on the opposite side of the head, which makes the horse turn his head. Tugging on both reins at the same time puts pressure on the jowls, nose and poll, which ‘hugs’ the whole head and slows the horse down. This bridle works well and has many satisfied followers.
Dr. Robert Cook, a veterinarian, Professor of Surgery Emeritus of Tufts University, Massachusetts and inventor of the Dr. Cook Bridle, has been doing research focused on diseases of the horse’s mouth, ear, nose and throat, with a special interest in unsoundness of wind, the cause of bleeding in racehorses, and the harmful effects of the bit method of communication.
Dr. Robert Cook is the author of two books for horsemen: Specifications for Speed in the Racehorse: The Airflow Factors, and Metal in the Mouth: The Abusive Effects of Bitted Bridles