Pig Nursery Management and Welfare: The Critical Early Phase

The nursery phase after weaning is among the most stressful periods in a pig's life, with management decisions in these weeks having lasting effects on health and welfare.

Key Facts

Commercial pigs are typically weaned at 21 to 28 days of age, far earlier than the natural weaning age of 12 to 16 weeks
Post-weaning stress syndrome causes diarrhea, reduced feed intake, and immune suppression in the days following separation from the sow
Mixing unfamiliar pigs at weaning results in aggression as new hierarchies form, causing injury and further immune stress
Environmental temperature management is critical as weaned piglets lose the warmth of close contact with the sow
Providing enrichment materials such as straw or jute ropes reduces aggression and redirects exploratory behavior positively
Early weaning is associated with higher rates of stereotypy development and abnormal behavior in pigs
Gradual introduction to solid feed prior to weaning reduces the dietary shock and gut disruption at weaning
Group size, stocking density, and mixing strategies at weaning significantly influence injury rates and stress in nursery pigs

Welfare Considerations

The welfare costs of early weaning in commercial pig production are substantial and well-documented. Piglets removed from their mothers weeks before natural weaning experience simultaneous stressors: social disruption, dietary change, new environment, mixing with unfamiliar animals, and loss of maternal contact. The cumulative effect is an acute stress response followed by immune suppression and increased disease susceptibility. Post-weaning diarrhea is both a welfare problem and a driver of antibiotic use. Extending the weaning age, providing enrichment at weaning, avoiding mixing unfamiliar litters where possible, and ensuring adequate thermal comfort represent concrete improvements with demonstrated welfare benefits that are within reach of most production systems.

What You Can Do

Advocate for extended weaning ages in pig welfare certification standards as a meaningful welfare improvement
Support farms providing enrichment at weaning to reduce aggression and abnormal behavior development
Push for reduction of routine preventative antibiotic use at weaning through investment in welfare-based alternatives
Learn about post-weaning welfare challenges and support research into stockmanship practices that reduce stress
Choose pork from producers with verified higher welfare weaning practices where labeling allows identification