Farm Animal Welfare

Pig Immunocastration as Alternative to Surgical Castration

Immunocastration using a vaccine that suppresses testosterone offers a welfare-positive alternative to surgical castration in pigs.

Key Facts

Improvac (GnRH-analogue vaccine) effectively suppresses boar taint without surgery
Immunocastration avoids the pain of surgical castration and ring castration
Two injections are required for full effect, with the second given 4-6 weeks before slaughter
Immunocastrated pigs show better welfare indicators and growth performance than surgically castrated pigs
Adoption varies by country with some markets resistant due to consumer acceptance concerns

Welfare Considerations

Immunocastration represents a meaningful welfare advance for pig production, eliminating the pain of surgical castration while controlling boar taint. Broader adoption requires industry education and consumer engagement to overcome resistance.

What You Can Do

Support pig producers using immunocastration instead of surgical methods
Advocate for immunocastration as the welfare-preferred alternative in certification schemes
Choose pork from producers committed to non-surgical alternatives to castration