Tail docking of piglets is routinely practiced to prevent tail biting, but causes pain and is required only when underlying causes of biting are not addressed.
Tail docking causes acute pain and has been associated with neuromas at the amputation site causing chronic pain. The practice treats a symptom - tail biting - rather than addressing its causes, which include barren environments, overcrowding, and inadequate enrichment. Tail biting itself causes welfare harm through wounds and infection. The welfare-positive approach is to address the root causes through improved management, eliminating the need for routine docking rather than performing a painful procedure to enable inadequate conditions.