Dramatic physiological changes accompany calving: hormonal shifts, immune suppression, metabolic demands of lactation onset, and the stress of parturition itself. Over 75% of dairy cow diseases occur in the first month after calving. Welfare failures during transition have cascading effects on the entire lactation.
A period of physiological immune suppression around calving increases susceptibility to mastitis, metritis, and respiratory disease. Nutrition, stress management, and transition monitoring all influence the severity of immune suppression. Adequate vitamin E, selenium, and beta-carotene supplementation supports immune function.
Peak lactation demands exceed feed intake capacity in early lactation. Cows mobilize body fat to meet the deficit, creating negative energy balance (NEB). Severe NEB leads to ketosis, fatty liver, and impaired reproductive function. Managing pre-calving body condition and early lactation diet reduces NEB severity.
Calving cows need clean, comfortable, private space with good traction and minimal disturbance. Group calving pens allow natural behavior but risk hygiene problems and competition. Individual calving pens provide control but restrict natural social behavior. Calving pen design is an active area of welfare research.
Daily monitoring of transition cows using behavioral indicators (rumination time, feed intake, locomotion score) enables early disease detection. Automated rumination collars identify cows at risk of ketosis and metritis before clinical signs appear. Early intervention dramatically improves outcomes.
Recognizing calving difficulty, providing appropriate assistance, monitoring for retained placenta, and early detection of post-calving disease all require skilled stockpeople. Training programs in transition cow management are associated with significant welfare improvements and reduced disease incidence across herds.