Weaning is one of the most stressful events in a pig's life, combining separation from the mother, social regrouping, dietary change, and environmental change simultaneously — optimal management significantly reduces welfare impacts.
The welfare impact of commercial weaning practices is significant. Simultaneously removing piglets from their mother, mixing them with unfamiliar conspecifics, changing their diet, and moving them to a new environment creates a multi-factor stress event that compromises immune function and increases disease susceptibility. Improving weaner welfare means addressing each stressor independently where possible — gradual dietary transition, minimising mixing of unfamiliar litters, maintaining familiar environmental cues, and providing complex enrichment that redirects exploration away from harmful belly nosing. Farms that invest in weaner transition management achieve better welfare outcomes and typically see economic benefits from improved growth and reduced medication use.