Routine tail docking of piglets is performed to prevent tail biting, but alternatives addressing the root causes of biting are increasingly effective and better for welfare.
Tail docking exemplifies the tension between addressing symptoms and addressing causes in farm animal welfare. Tail biting causes injury and significant welfare harm, and docking reduces the injury severity when biting occurs. But biting occurs because pigs in barren, overcrowded environments redirect their powerful rooting and foraging motivation onto available targets — each other. Addressing the cause — enrichment provision, space, and environmental complexity — eliminates most tail biting and eliminates the need for docking. Countries that have genuinely implemented enrichment requirements have demonstrated that undocked pigs can be commercially raised without unacceptable tail biting rates. The welfare solution is environmental improvement, not symptom management through painful mutilation.