Tail docking — removing part of a piglet's tail — is routinely performed to reduce tail biting risk in commercial pig production. It causes pain and is legally restricted in many jurisdictions but remains widespread due to tail biting pressure.
Tail docking creates a welfare trade-off that is genuinely complex. The procedure causes acute pain and is a mutilation — removing part of an animal's body to compensate for conditions that cause biting behaviour. Yet without docking in high-risk housing conditions, tail biting wounds can be severe and involve multiple victims in a pen. The welfare calculus shifts decisively when housing and management conditions are improved: farms with adequate enrichment, appropriate stocking density, and good nutritional management can maintain intact-tailed pigs with acceptable tail biting rates. The policy challenge is that improving housing conditions costs money while the welfare cost of docking is borne by the piglet rather than the producer. Regulatory enforcement of the EU restriction — rather than routinely granting exceptions — is the most direct policy lever.