Farm Animals

Pig Boar Taint Immunocastration Welfare

Surgical castration of male piglets to prevent boar taint in meat is being replaced by immunocastration, offering improved welfare outcomes.

Key Facts

Boar taint affects meat from entire (intact) male pigs and is caused by androstenone and skatole
Surgical castration is banned without anaesthesia in the UK but common without it in much of Europe
Improvac (immunocastration vaccine) suppresses taint hormones via two injections before slaughter
Immunocastrated pigs retain growth advantages of entire males until the second injection
Consumer acceptance of immunocastration is high when informed about the animal welfare benefits

Welfare Considerations

Surgical castration of piglets causes acute pain that persists for days. Immunocastration eliminates the need for surgery while achieving the same meat quality outcome, representing a clear welfare improvement that is also economically viable for producers.

What You Can Do

Support retailers committing to immunocastration over surgical castration in their pork supply
Advocate for a European ban on surgical piglet castration with a phase-in period
Choose pork from immunocastration or entire male programmes
Learn about boar taint and why immunocastration is the welfare-aligned solution