Farmed Pig Genetic Welfare Improvement

Breeding programs that select for health and welfare traits alongside production performance offer the most systemic and scalable pathway to long-term welfare improvement in commercial pig production.

Key Facts

Modern pig breeding has primarily selected for lean growth, feed efficiency, and litter size
Selection pressure for these traits has inadvertently increased susceptibility to leg problems and stress reactivity
Breeding programs now include health and robustness traits to reverse some welfare-negative selection outcomes
Genetic variants associated with increased pain sensitivity (halothane gene) have been largely eliminated from commercial lines
Breeding for positive welfare traits including playfulness and calmness is technically feasible but requires measurement tools

Welfare Considerations

The most scalable welfare improvement available in pig production operates at the genetic level — traits selected in breeding programs determine the welfare capacity and health robustness of every pig produced from those genetics for generations. Including welfare-relevant health traits such as leg strength, immune function, and stress resilience in selection indices produces compounding welfare benefits that propagate through the entire commercial sector. Breeding companies that invest in welfare trait measurement and selection create welfare improvements that reach every farm using their genetics.

What You Can Do

Support pork producers and breeding companies investing in welfare trait measurement and selection
Advocate for government research funding for pig welfare genetics and phenotyping tools
Learn about the genetic basis of pig welfare traits and how breeding can address systemic welfare problems
Follow progress in pig breeding programs through research institutions working on welfare genetics