Post-Weaning Diarrhea in Pigs: Prevention and Welfare

Post-weaning diarrhea is a major welfare and economic challenge in pig production, with prevention strategies reducing suffering without antibiotics.

Key Facts

E. coli post-weaning diarrhea typically occurs 4-14 days after weaning
Weaning is the highest-stress event in a pig's life - abrupt diet change, social disruption, and environmental change combine
Mortality from severe PWD can be high without treatment
Zinc oxide at pharmacological doses has been used to control PWD but is banned in the EU from 2022
Alternatives include vaccination, probiotics, dietary interventions (acidifiers, prebiotics), and management changes
Increasing weaning age reduces PWD incidence significantly
Gradual feed transition and creep feeding before weaning improves post-weaning gut health

Welfare Considerations

Post-weaning diarrhea causes acute suffering - dehydration, weakness, and systemic illness in piglets already stressed by weaning. Preventive strategies that reduce disease incidence prevent this suffering without antibiotic use. The EU ban on pharmacological zinc oxide necessitates investment in alternative prevention approaches, which has driven welfare-positive innovation including better management, vaccination, and dietary strategies. Farms that invest in these alternatives achieve lower PWD incidence while protecting antimicrobial efficacy.

What You Can Do

Implement creep feeding before weaning to prepare piglets for solid food transition
Increase weaning age to reduce vulnerability and improve gut maturity at weaning
Use buffered organic acids and prebiotics in post-weaning diets to support gut health
Vaccinate sows against E. coli to provide maternal antibody protection to piglets
Monitor piglets closely in the first two weeks after weaning and treat sick animals promptly