Stable Vices

Stable vices are stereotypies of equines, especially horses. They usually develop as a result of being confined, particularly with insufficient exercise (i.e. in a stable). Vices can develop out of boredom or hunger, excess energy, isolation. They present a management issue, not only leading to facility damage from chewing, kicking, and repetitive motion, but also lead to health consequences for the animal if not addressed. They also may raise animal welfare concerns.

Stereotypical behaviors in animals generally are thought to be caused ultimately by artificial environments that do not allow animals to satisfy their normal behavioral needs. Rather than refer to the behavior as abnormal, it has been suggested that it be described as "behavior indicative of an abnormal environment."

It was once thought that stable vices may be learned by observing other horses who already have the habit, but studies on the topic to date have failed to establish this as a cause. Stereotypies are correlated with altered behavioral response selection in the basal ganglia. Although a more enriched environment may help minimize or eliminate some behaviors, once established, it is sometimes impossible to eliminate due to alterations in the brain.