Farmed Pig Weaning Age and Welfare

The age at which piglets are weaned from their mothers has significant welfare implications for both the sow and her offspring. Commercial weaning at 21-28 days is far earlier than the natural weaning age of 12-17 weeks, causing documented stress and developmental problems.

Key Facts

In commercial pig production, piglets are typically weaned at 21-28 days of age
Natural weaning in wild pigs occurs gradually between 12-17 weeks of age
Early weaning causes acute stress in both sows and piglets measurable through cortisol elevation
Weaning diarrhoea (post-weaning colitis) is a leading cause of piglet mortality and welfare compromise
The abrupt transition from milk to solid food challenges the immature digestive system
Piglets weaned early show higher rates of stereotypic behaviours including bar-biting and belly-nosing
Longer lactation periods of 42-56 days in alternative systems dramatically improve piglet welfare outcomes
EU regulations prohibit weaning before 28 days except in exceptional circumstances

Welfare Considerations

Early weaning is one of the most significant departures from natural pig behaviour in commercial production. The acute distress of sow-piglet separation is well documented. Piglets weaned at 21 days face a digestive system not yet adapted for solid food, social disruption, and environmental change simultaneously. The high rates of post-weaning diarrhoea and stereotypic behaviour in commercial systems reflect these welfare costs. Systems using longer lactation periods consistently show better welfare outcomes at a modest additional cost.

What You Can Do

Choose pork from producers using minimum 28-day lactation or certified higher welfare systems
Support legislation requiring minimum weaning ages and phasing out of very early weaning
Advocate for industry incentives to extend lactation periods toward more natural timings
Learn about the welfare implications of weaning age when understanding modern pig production