Difficult calvings (dystocia) and twin calvings cause significant welfare harm to cows and calves. Prevention, preparation, and prompt skilled intervention reduce suffering.
Dystocia causes significant welfare harm to both cow and calf. Prolonged labor causes fetal hypoxia, increasing stillbirth risk, and causes exhaustion, tissue trauma, and pain in the cow. The welfare harm scales with intervention delay — every hour of unassisted obstructed labor increases calf mortality risk and cow injury severity. Calving difficulty scoring (1-5 scale) provides a framework for intervention timing, but practical stockperson judgment and experience remain critical.
Twin calvings create specific welfare challenges. The second twin is often presented in abnormal position after the first is born, requiring prompt correction and assistance. Both calves may be smaller and weaker than singleton calves, requiring additional colostrum and warmth management. The cow is at higher risk of postpartum hypocalcaemia, metritis, and retained fetal membranes after twin calvings.
Pre-calving monitoring — dedicated calving boxes, regular checks during late gestation, and trained stockpersons — enables early intervention when dystocia begins. Appropriate intervention at 30-60 minutes of visible second-stage labor (before fetal distress develops) provides the best welfare outcomes for cow and calf. Post-calving assessment of both cow and calf welfare guides immediate management decisions.