Pig Neonatal Mortality: Welfare and Prevention

Understanding the causes of neonatal piglet mortality in commercial production and welfare-focused strategies for reducing losses while protecting sow welfare.

Key Facts

Neonatal piglet mortality rates of 10-20% are common in commercial pig production, with crushing by the sow accounting for approximately 50% of deaths
Piglets born from hyper-prolific sows (averaging 16+ piglets per litter) are more likely to be underweight and at greater risk of mortality
Colostrum intake within the first 24 hours is critical for piglet survival — piglets that fail to nurse adequate colostrum have dramatically higher mortality
Split nursing — separating larger piglets temporarily to ensure smaller ones access to teats — improves equity of colostrum access
Nurse sow programs using sows with established milk supply to foster excess piglets cause welfare trade-offs for both fostered piglets and nurse sows
Anti-crushing bars in farrowing pens are used to reduce crushing mortality, but their effectiveness depends on correct placement and sow size

Welfare Considerations

Neonatal piglet mortality represents welfare harm both to the piglets that die — often from prolonged hypothermia or crushing — and to the sow whose biological capacity to rear her litter is exceeded by modern hyper-prolific genetics. The welfare calculus here is complex: selecting for very large litters increases individual piglet mortality risk while also creating the need for management interventions like nurse sows that impose their own welfare costs. Welfare-focused approaches include moderating selection pressure for extreme litter size, providing adequate nest-building material to sows before farrowing to reduce mortality through improved behavioral preparation, ensuring adequate heating for newborns, and prioritizing split nursing over blanket piglet fostering that disrupts maternal bonds.

What You Can Do

Support pig farming operations that breed for moderate litter size alongside piglet viability rather than extreme litter numbers
Choose pork from systems that provide nest-building material to sows before farrowing, which reduces neonatal mortality naturally
Advocate for hyper-prolificacy breeding reform that balances productivity with neonatal viability and sow welfare
Support research into the welfare impact of nurse sow programs on both the fostered piglets and the nurse sows involved
If working in pig production, prioritize colostrum management protocols that ensure all piglets in the litter receive adequate intake