Early weaning of piglets in commercial systems causes significant stress to both sows and piglets. Understanding the welfare implications helps evaluate alternative management approaches.
Early weaning is one of the most significant sources of acute welfare harm in commercial pig production, affecting both the sow and every piglet in every litter. The abrupt separation of a social bond formed over weeks, before the piglet digestive system is ready for solid food, causes psychological and physiological stress simultaneously. Piglets left without maternal milk and social buffering face a critical immunological window with greater disease risk. Extending lactation even by one or two weeks significantly improves welfare outcomes without prohibitive costs. Consumer and regulatory pressure for longer lactation periods represents a tractable and meaningful welfare improvement opportunity for one of the most widely farmed species on Earth.