Early weaning practices in commercial pig production cause significant welfare impacts on both sows and piglets, with long-term behavioral consequences.
Early weaning is one of the most significant and avoidable welfare problems in commercial pig production. The abrupt separation of piglets from their mother at 21 days causes acute distress in both sow and piglets. Piglets removed this early lack immune maturity and behavioral skills, leading to health problems and abnormal behaviors that persist into adulthood. Belly-nosing - piglets sucking on pen-mates' abdomens - is a misdirected nursing behavior caused entirely by early weaning. The welfare improvement from extending weaning age is substantial, demonstrable, and achievable without prohibitive cost.