Stable vices — repetitive stereotypic behaviors in horses — indicate inadequate environmental conditions; prevention through management changes is far more effective than physical restraints.
Stable vices are behavioral indicators of welfare compromise. A horse that cribs, weaves, or stall walks is communicating through its behavior that its behavioral needs are not being met — typically insufficient foraging time, social contact, movement opportunities, or environmental complexity. The gold standard response is management change: increased hay provision, social housing or companion animals, turnout time, and environmental enrichment. Physical restraints like crib-biting collars cause additional suffering by preventing the behavior without addressing its cause, and do not improve the underlying welfare state. Veterinary guidance suggests that horses showing stereotypies should be evaluated for their management conditions, not just treated symptomatically with physical prevention.