Farmed Animals

Pig Genetics and Welfare: Selection for Health

Genetic selection in commercial pig production has focused primarily on growth and leanness, with welfare-relevant health traits often deprioritized.

Key Facts

Estimated breeding values for leg health are available but rarely prioritized by breeding companies
High lean meat percentage genetics are associated with increased stress susceptibility in some lines
Mothering ability including teat access assistance and piglet crushing rates varies by genetic line
PRRS and other disease resistance traits can be selected for without genetic modification

Welfare Considerations

The genetic foundation of pig welfare is established at conception. Genetics that prioritize leg health, disease resistance, and maternal behavior would improve welfare for every pig in the system without management changes. The challenge is that welfare traits are harder to measure and monetize than production traits, requiring certification and consumer pressure to create market demand for welfare genetics.

What You Can Do

Support certification schemes that require welfare genetics criteria alongside production criteria
Advocate for national pig breeding programs to include welfare trait estimated breeding values
Choose pork from producers demonstrating welfare-focused genetics in their supply chain
Support research developing practical welfare indicator genetics for commercial pig populations