Tail docking of pigs is a painful mutilation used to prevent tail biting, rather than addressing its root causes.
Tail docking causes acute pain during the procedure and potentially chronic neuropathic pain afterward. It is performed to prevent tail biting — a behaviour caused by poor husbandry. Addressing root causes through enrichment, appropriate stocking density, and better nutrition eliminates the need for docking and improves overall welfare dramatically. Tail docking is a welfare symptom of deeper system failures.