Tail biting in pigs is a significant welfare problem caused by barren environments and high stocking density, not inherent pig behavior.
Tail biting causes painful wounds, secondary infection, and spinal abscess in affected pigs. It is a behavioral problem caused by inadequate environments rather than pig nature. Routine tail docking without analgesia is itself a welfare harm and is legally restricted in many countries without prior enrichment provision. Addressing root causes through enrichment is the welfare-positive solution.