Weaning Age and Pig Welfare: Finding the Optimal Balance

The age at which piglets are weaned profoundly affects their welfare, with early weaning causing developmental and behavioral problems.

Key Facts

EU legislation requires minimum weaning age of 28 days for piglets
Commercial practice often weans at 21-28 days; natural weaning occurs at 12-17 weeks
Piglets weaned before 21 days show higher rates of aggression, belly nosing, and tail biting
Post-weaning diarrhea risk is higher in very early-weaned piglets due to gut immaturity
Later weaning improves piglet immunity, social development, and behavioral welfare
Sow welfare considerations (mastitis, body condition) also inform optimal weaning age
Higher welfare standards in several countries require weaning at 28 days minimum

Welfare Considerations

Early weaning is a significant welfare intervention in pig production - abrupt separation from the sow at 21 days deprives piglets of immune, nutritional, and social benefits of continued maternal contact. The behavioral consequences of early weaning - suckling behavior redirected to pen mates, increased aggression, and heightened vulnerability to stressors - represent welfare costs that accumulate across the pig's life. Later weaning at 28+ days produces demonstrably better behavioral welfare outcomes. The welfare case for respecting the minimum weaning age legislation is strong.

What You Can Do

Support pig producers that wean at 28 days or later rather than the minimum possible age
Advocate for strong enforcement of minimum weaning age legislation in your country
Choose pork certified under standards requiring later weaning ages
Support research into optimal weaning management that protects both sow and piglet welfare
Learn about the welfare implications of weaning age when discussing pig production with others