Male pig castration is practiced to prevent boar taint in pork, but causes significant pain without adequate analgesia.
Surgical castration of piglets causes clear pain responses: vocalizations, withdrawal, and behavioral changes persist for days. Despite its scale, pain relief is rarely provided. Effective alternatives exist: immunocastration eliminates boar taint without surgery; raising intact males with slaughter before sexual maturity is practiced in some systems. Welfare improvements require industry and regulatory will.