Pig Weaning Stress and Welfare | Animal Welfare Hub

Early weaning of piglets in commercial production causes significant stress for both sows and piglets, with welfare implications that persist through the post-weaning period.

Key Facts

Commercial pig production typically weans piglets at 21-28 days of age — earlier than the 12-17 weeks of natural weaning.
Early weaned piglets frequently show post-weaning diarrhoea, reduced growth, and increased aggression when mixed with unfamiliar pigs.
The sow's udder involution after early weaning can be painful, and repeated early weaning cycles contribute to sow reproductive fatigue.
Later weaning ages produce piglets with stronger immune systems, reduced medication requirements, and better lifetime performance.
EU regulations set a minimum weaning age of 28 days, but higher-welfare standards require 35 days or later.

Welfare Considerations

Early weaning is a welfare compromise imposed by the production logic of maximizing sow reproductive turnover. Piglets weaned at 21 days are immunologically immature, highly stressed by separation, and placed in a new social environment simultaneously — a welfare triple-stressor. Extended weaning ages, dam-rearing systems, and gradual weaning protocols reduce the welfare impact significantly and are increasingly required by premium welfare assurance schemes.

What You Can Do

Choose pork certified under higher-welfare standards that require minimum weaning ages of 35 days or later.
Support policy campaigns for raising the minimum weaning age in commercial pig production regulations.
Reduce pork consumption and replace with plant-based proteins to reduce demand for early-weaning systems.
Support research into production models that accommodate later weaning without disproportionate economic penalty.