Cribbing is an abnormal, compulsive behavior seen in some horses, and considered a stable vice. It involves the horse grabbing a solid object such as the stall door or fence rail with its incisors, then arching its neck, pulling against the object, and sucking in air. Some cases are thought to be linked to boredom or anxiety, often related to confinement. Boredom, stress, habit and addiction are also all possible causes of cribbing and windsucking.