Advanced welfare science on pig weaning practices, examining the evidence on optimal weaning age, post-weaning management, and innovative approaches to reducing the welfare cost of early commercial weaning.
Advanced weaning welfare science has moved beyond simply documenting the harms of early commercial weaning to identifying specific interventions that reduce welfare costs within the constraints of commercial production. Each element of weaning stress — dietary transition, social disruption, environmental change — can be partially ameliorated through targeted management. Creep feed provision before weaning reduces dietary transition severity; gradual social mixing rather than abrupt grouping reduces aggression peaks; immediate enrichment provision at weaning redirects behavioral energy; nurse sow systems extend milk access; and delay of even one week reduces the severity of stress response. No single intervention eliminates weaning stress, but evidence-based combination approaches significantly reduce the welfare cost of commercial weaning practice.