Pig Weaning Stress and Welfare | Animal Welfare Hub

Commercial weaning at 3-4 weeks separates piglets from sows far earlier than natural weaning. Understanding and mitigating weaning stress is a priority welfare issue.

Key Facts

Commercial pigs are weaned at 21-28 days, compared to natural weaning at 12-17 weeks
Weaning causes simultaneous social, nutritional and environmental disruption for piglets
Post-weaning diarrhoea is the leading cause of piglet mortality and morbidity
Weaning at older ages (28+ days) significantly reduces stress responses and mortality
Some welfare systems require minimum 28-day weaning age - EU regulation sets 21 days as minimum

Welfare Considerations

Weaning is among the most welfare-compromising routine events in commercial pig production. Simultaneous separation from the dam, mixing with unfamiliar piglets and introduction to solid feed creates multiple simultaneous stressors. Cortisol elevation persists for 48-72 hours post-weaning. Older weaning ages reduce stress responses significantly - each additional week of nursing improves piglet behavioural and physiological stress indicators. Transition feed strategies, familiar bedding and maintaining litter-mates together reduce weaning stress in commercial systems where early weaning is economically entrenched.

What You Can Do

Support welfare certification schemes requiring minimum 28-day weaning age in pigs
Choose pork from producers committed to older weaning as a welfare standard
Advocate for EU and UK legislative minimum weaning age reform to 28 days
Support research into weaning transition management strategies reducing stress at standard weaning ages
Engage with pig industry networks promoting older weaning as a combined welfare and performance benefit