Pig Weaning Stress: Welfare at the Point of Separation

How early weaning affects piglet and sow welfare and what management strategies reduce stress at separation.

Key Facts

Commercial pigs are typically weaned at 3-4 weeks compared to 12-17 weeks in natural settings
Post-weaning stress is characterised by reduced feed intake, weight loss, diarrhoea and immune suppression in piglets
Sows show vocalisation, restlessness and reduced feed intake following abrupt removal of piglets
Early weaning is associated with increased stereotype and aggressive behaviour in piglets
Providing creep feed from 7-10 days significantly improves feed intake transition at weaning
Gradual weaning or sow removal over 3-5 days rather than abrupt separation reduces cortisol in both sow and piglets

Welfare Considerations

Weaning is one of the most welfare-significant events in the commercial pig production cycle. Piglets experience simultaneous separation from their mother, loss of milk nutrition, mixing with unfamiliar piglets and transfer to a new environment. Each of these stressors alone would be welfare-significant; combined they represent a major challenge to the developing immune system and psyche of a 3-4 week old animal. The welfare case for extending weaning age where biosecurity allows, providing better creep feed management and reducing the number of concurrent stressors at weaning is strong. Systems that allow more natural weaning timelines demonstrate lower post-weaning disease rates.

What You Can Do

Provide high-quality, highly palatable creep feed from 7-10 days of age to familiarise piglets with solid food before weaning
Where biosecurity allows, consider extending weaning age to 4-5 weeks to allow better gut development
Minimise the number of stressors coinciding with weaning - do not mix litters, change environments and wean on the same day if avoidable
Ensure weaning pens are warm, clean and provided with enrichment materials to reduce post-weaning aggression
Monitor feed intake closely in the week after weaning and intervene early if piglets are not eating adequately
Review sow management around weaning - sows benefit from gradual withdrawal of piglets where management allows