Horses are highly social animals that evolved in herds. Isolation causes significant psychological distress, and managing horse social needs is fundamental to equine welfare.
Horse social needs are fundamental to their welfare yet frequently neglected in management systems prioritising convenience or economics. The horse's stress response system evolved in a social context where isolation signalled danger; isolated horses experience genuine anxiety that manifests physiologically and behaviourally. Stereotypic behaviours including weaving, box-walking, and wood-chewing are strongly correlated with social isolation and inadequate social contact. Management systems that maximise turnout in compatible groups provide the most welfare-positive social environments. Where group turnout is impractical, visual and olfactory contact through shared fence lines, stable windows, and adjacent paddocks provides partial mitigation. Single-horse situations require creative solutions including companion animals and maximised human contact. Recognising social isolation as a welfare problem rather than a management preference is an important attitude shift in horse-keeping culture.