Comprehensive evidence on analgesic options for routine and surgical pig procedures
Pigs undergo numerous painful procedures in commercial production: castration, tail docking, teeth clipping, ear notching, hernia repair, and injury treatment. Historically, most of these have been performed without analgesia. Evidence now supports effective, affordable pain management options for all common pig procedures. Implementation barriers are declining as products become approved, affordable, and as regulatory pressure increases.
Surgical castration of male piglets is performed to prevent "boar taint" in meat. Without analgesia, it causes acute and prolonged pain (elevated cortisol, pain vocalizations, reduced activity for 24-48 hours). Combined local anesthesia and NSAID treatment is the welfare-positive standard. Immunological castration (Improvac vaccine) eliminates surgical pain entirely while achieving the same boar taint reduction — the most welfare-positive alternative where accepted by retailers.
Tail docking removes 50-75% of the tail to prevent tail biting. Without analgesia: acute pain during procedure, potential chronic pain from neuroma formation at cut end. Local anesthesia at docking reduces acute pain response but doesn't address neuroma risk. The welfare-positive approach is elimination of routine tail docking through enrichment and management changes (as Sweden, Finland, Norway demonstrate), using analgesia only as a bridge during transition.
Difficult farrowing (dystocia) is extremely painful. Veterinary intervention (manipulation, oxytocin, Caesarean) should include pain management: epidural anesthesia for surgical procedures, NSAIDs for medical management. Oxytocin without pain relief for prolonged difficult labor causes welfare harm that is preventable. Post-farrowing NSAID administration reduces udder inflammation and improves subsequent lactation performance — welfare and production benefits are aligned.