Farm Pig Weaning Age and Welfare

Early weaning of piglets from sows is standard in intensive pig production — the welfare costs to both sow and piglet are significant and well-documented.

Key Facts

Wild pigs wean naturally at 12-17 weeks; commercial pigs are typically weaned at 3-4 weeks, often 21 days.
The EU minimum weaning age is 28 days, with exceptions for management reasons allowing weaning at 21 days.
Early-weaned piglets show acute distress including increased vocalisation, restlessness, and gastric ulcers from abrupt diet change.
Sows show vocalisation and searching behaviour following piglet removal, indicating emotional distress from separation.
Later weaning (28+ days) improves piglet health outcomes including reduced post-weaning diarrhoea and better growth rates.

Welfare Considerations

Piglet weaning age is a welfare intervention point where changes to standard practice have documentably positive outcomes for both sow and piglet. Abrupt weaning at 3 weeks causes acute distress in piglets transitioning from milk to solid food with immature digestive systems, and in sows losing established nursing relationships. Later weaning at 28+ days — the current minimum standard in the EU — reduces these welfare costs without major productivity loss. Advocating for later minimum weaning ages in countries where 21-day weaning remains standard is a tractable welfare improvement.

What You Can Do

Support pork producers and certification schemes that maintain 28+ day weaning ages as a welfare standard.
Advocate for 28-day minimum weaning age legislation in countries where 21-day weaning is still permitted.
Choose pork from producers certified to higher welfare standards that include weaning age requirements.
Donate to pig welfare research on later weaning strategies and their effects on sow and piglet welfare.