Transition Cow Management: Welfare in the Critical Period
DairyTransition CowsWelfareMetabolic Disease
The transition period — the three weeks before and three weeks after calving — is the most welfare-critical phase of the dairy cow's production cycle. The majority of production diseases and welfare problems affecting dairy cows originate during this period. Outstanding transition cow management is the single most impactful intervention available for improving dairy cow welfare.
Why Transition Is Critical
At calving, a dairy cow faces simultaneous physiological challenges of enormous magnitude: the abrupt onset of lactation creates an energy deficit of up to 15kg DM/day; calcium demand for colostrum and milk massively exceeds dietary supply; the immune system undergoes profound changes; and the digestive system must adapt from a dry period ration to a high-energy lactation diet. Each of these transitions creates a specific disease risk when not managed correctly.
Key Welfare Risks
Negative energy balance (NEB): All dairy cows enter NEB after calving. Excessive NEB drives subclinical and clinical ketosis, which suppresses immune function, increases lameness risk, and impairs reproductive performance.
Hypocalcaemia: Sudden calcium demand at calving exceeds calcium mobilisation capacity; clinical milk fever occurs in 5-10% of cows; subclinical hypocalcaemia is far more prevalent and predisposes to a cascade of other diseases.
Rumen acidosis: Dietary transition from high-fibre dry period rations to high-energy lactation rations must be managed carefully to avoid displacing rumen populations and triggering acidosis.
Displaced abomasum: Reduced rumen fill pre-calving combined with excessive body condition loss enables abomasal displacement — requiring surgical correction.
Management Best Practice
Avoid overconditioned cows at calving (BCS target 2.75-3.25) — overconditioned cows have greater NEB and higher metabolic disease risk
Provide close-up cows (last 3 weeks pre-calving) with their own group, adequate space, and transition diet
Monitor fresh cows daily for the first 2 weeks: appetite, demeanour, milk yield, signs of lameness or disease
BHBA monitoring (ketosis screening) in first 7-14 days using cow-side tests
Pre-calving DCAB feeding to reduce hypocalcaemia risk
Fresh Cow Health Protocols
Systematic fresh cow monitoring with established treatment thresholds dramatically improves welfare outcomes and reduces chronic disease. Key elements: daily visual assessment, weekly BCS, BHBA monitoring, metritis scoring, body temperature recording, and consistent treatment protocols for identified conditions. Fresh cow health programmes significantly reduce second-lactation disease and extend productive life.