Farm Animal Welfare

Pig Wean-to-Service Interval Welfare

The wean-to-service interval in sows affects reproductive performance and welfare, with management strategies addressing extended intervals.

Key Facts

The wean-to-service interval is the time from weaning to the next successful mating in sows
Extended intervals delay return to production and indicate metabolic or environmental stress
Nutrition during lactation significantly affects post-weaning ovarian recovery
Boar exposure, light management, and dietary flushing reduce wean-to-service intervals
Short intervals in first-litter gilts can compromise body condition and longevity

Welfare Considerations

The wean-to-service interval is a welfare indicator as well as a production measure - extended intervals indicate that sows have depleted body reserves during lactation or are experiencing management stress. Optimizing lactation nutrition protects both sow welfare and reproductive performance.

What You Can Do

Support pig farms investing in sow lactation nutrition monitoring
Advocate for sow body condition scoring programs in pig welfare certification
Choose pork from farms demonstrating good sow welfare and longevity outcomes