Farm Animal Welfare

Pig Welfare and Immune Function at Weaning

Weaning is a critical immunological challenge for piglets. The abrupt loss of maternal antibodies and transition to solid feed creates a vulnerable window for disease and welfare deterioration.

Key Facts

Maternal antibody protection declines sharply at weaning at three to four weeks
Post-weaning immune suppression creates a window for enteric and respiratory disease
Zinc oxide supplementation has been used to manage post-weaning diarrhoea but restrictions apply
Probiotic and prebiotic additives can support gut-associated immune development at weaning
Gradual dietary transition before weaning reduces digestive stress and immune challenge

Welfare Considerations

The post-weaning immune dip causes preventable disease and suffering in millions of piglets. Nutritional and management strategies that support immune function during this window prevent significant welfare costs.

What You Can Do

Advocate for nutritional support requirements in pig welfare standards covering the weaning transition
Support research into probiotic and dietary approaches to post-weaning immune support
Choose welfare-certified pork from farms with documented weaning management protocols