Horses are highly social animals that evolved in herds. Keeping horses alone or in limited social contact is a significant welfare compromise that causes chronic stress and behavioral abnormalities.
Horse isolation is so common in equestrian culture that it has become normalized, but normalization does not eliminate welfare consequences. A horse kept alone in a stall for 22 hours a day is experiencing chronic social deprivation. The stereotypic behaviors that result — weaving, cribbing, box-walking — are not quirks but symptoms. They develop because social and movement needs are chronically unmet. Changing this requires shifts in barn design, management philosophy, and the cultural norms of horse ownership. The evidence is clear: horses are healthier, calmer, and behaviorally richer when kept in appropriate social groups.