Transition Cow Welfare: The Critical Three-Week Period
Metabolic Demands of Transition
The transition period (3 weeks before to 3 weeks after calving) is characterised by enormous metabolic demands: the cow must mobilise body reserves to support rapidly increasing milk production while recovering from calving, establishing uterine involution, and resuming normal immune function. Dry matter intake typically drops before calving, creating a negative energy balance when milk production demands are highest. This metabolic stress predisposes to multiple disease conditions.
Transition Diseases and Welfare
Transition diseases cluster in the first 2-4 weeks after calving: hypocalcaemia (milk fever), fatty liver, ketosis, displaced abomasum, metritis, mastitis, and lameness are all more frequent in this period. These conditions cause significant suffering individually and interact: a cow with subclinical hypocalcaemia is more likely to develop mastitis and metritis. Prevention of transition disease is among the most welfare-impactful investments a dairy farm can make.
Dry Period Nutrition Management
Dry period nutrition profoundly affects transition success. Overconditioned cows (BCS >3.5 at drying off) mobilise excessive body fat post-calving, increasing ketosis and fatty liver risk. Controlled energy intake in the far-off dry period (8-3 weeks before calving) prevents over-conditioning. DCAD (dietary cation-anion difference) manipulation in the close-up dry period (3 weeks before calving) stimulates calcium mobilisation, dramatically reducing milk fever incidence.
Housing and Social Environment
Transition cow housing must provide: adequate feed face space (minimum 0.75m per cow at the TMR face) to prevent competitive exclusion of submissive cows; sufficient lying space (one cubicle per cow plus 10-20%); comfortable cubicle design; low stocking density (≤80%); and separation from main lactating herd to reduce competitive pressure. Social stability in the close-up group reduces stress: minimise regroupings in the 3 weeks before calving.
Monitoring and Early Intervention
Systematic monitoring of transition cows improves welfare: daily observation, weekly BCS, ketone monitoring (blood or urine) of fresh cows, reproductive examination post-calving, and milk fever protocol trigger monitoring. Subclinical ketosis affects up to 40% of fresh cows without clinical signs but impairs immune function, fertility, and milk production. Propylene glycol drenching of at-risk cows provides energy supplementation. Protocols for early treatment of all transition diseases reduce severity and duration of suffering.