Farm Animal Welfare

Pig Immunocastration and Boar Taint Welfare

Immunocastration using a gonadotropin-releasing hormone vaccine is a welfare-positive alternative to surgical castration that eliminates boar taint while avoiding the pain of surgery.

Key Facts

Surgical castration causes acute pain and can cause chronic pain if improperly performed
Immunocastration (Improvac) requires two vaccinations and acts like temporary castration
Immunocastrated pigs show higher growth rates and feed efficiency than surgically castrated pigs
Boar taint in entire males is caused by androstenone and skatole
Immunocastration is banned in some markets due to consumer concerns despite welfare benefits

Welfare Considerations

Immunocastration represents a genuine welfare advance over surgical castration. It eliminates the acute and chronic pain of surgery while achieving the same boar taint reduction outcome through humane pharmacological means. The welfare case for immunocastration over surgical castration is strong, and consumer and retailer acceptance is growing in welfare-conscious markets.

What You Can Do

Support pork producers using immunocastration as an alternative to surgical castration
Advocate for immunocastration to be recognised as a higher-welfare alternative in standards
Choose pork products from producers committed to eliminating surgical castration