Cribbing is a compulsive behavioral disorder in which a horse habitually bites down on a horizontal surface with its incisors and sucks in air, often making a grunting or gulping noise. You know it if you've seen it. In one study of U.S. horses, the overall prevalence of this behavior was 4.4%.J In that study, Thoroughbreds were the breed most commonly affected at 13.3%.
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