New hope for headshakers

Ongoing research into a neurologic cause of headshaking may soon lead to more effective treatments for the most frustrating cases.

Ongoing research into a neurologic cause of headshaking may soon lead to more effective treatments for the most frustrating cases.

Sarah brought her new horse home in December. Westley, an 8-year-old Thoroughbred cross, was wellbehaved and showed real potential as the pair spent the winter months training in the indoor arena. It was only when warmer weather arrived that their troubles began. The first time Westley flipped his nose up, jerking the reins from her hands, Sarah thought he had been bothered by an insect she didn’t see. But then he did it again. And again. Within minutes, Westley was having a full-on meltdown: tossing his head up and down frantically, snorting, and rubbing his nose on his front legs. He became so agitated that he was unsafe to ride. Sarah hopped off and wondered what had happened to her easygoing horse. It would require weeks of veterinary visits before she had the devastating answer: Westley was a headshaker.

Every horse shakes his head on occasion---after all, it’s an effective method for evading flies and other pests. In some cases, however, headshaking is a signal that a horse is uncomfortable or in pain. Repetitive headshaking can be caused by poorly fitted tack, a heavy-handed rider, tooth abscesses, tumors, ear mites, cysts or infections around the eyes or in the sinuses. The behavior is disruptive, but once the source of trouble is identified and addressed, it stops.

Far more frustrating are cases of headshaking that have no identifiable