Calving is the most welfare-critical event in the dairy cow's year. The hours around parturition carry the highest risk of death or serious injury for both cow and calf, and management decisions during this period have lasting consequences for the welfare of both animals throughout the subsequent lactation and the calf's early life.
A clean, quiet, well-bedded calving area significantly improves outcomes. Key requirements:
Understanding normal calving progress enables appropriate timing of intervention. Stage 1 (preparatory): dilation of cervix, restlessness, may last 2-6 hours. Stage 2 (expulsion): active straining begins with appearance of waterbags; first and second calves should be born within 1-2 hours of active straining in first-calvers; 30-60 minutes in cows. Stage 3 (cleansing): passage of fetal membranes within 6-8 hours.
Intervention thresholds: examine after 30 minutes of active straining without progress (first-calvers) or 20 minutes (cows). Correct principles:
Allow brief maternal bonding where possible before calf separation in dairy systems — even brief bonding improves calf health outcomes. Ensure cow has feed, water, and adequate bedding immediately post-calving. Monitor for retained fetal membranes, metritis, and hypocalcaemia in the first week after calving.