Dairy Cow Transition Period: Metabolic Welfare

The three weeks before and after calving represent the highest-risk period for dairy cow health and welfare. Metabolic diseases including milk fever, ketosis, and displaced abomasum cluster in this transition period.

Key Facts

Transition period disorders including hypocalcaemia, ketosis, metritis, and DA affect up to 30-40% of dairy cows in poorly managed herds
Subclinical ketosis (elevated blood ketones without obvious clinical signs) affects up to 50% of early lactation cows in some surveys
Hypocalcaemia (milk fever) occurs as calcium is mobilised for colostrum and milk production, causing muscle weakness and recumbency
Negative energy balance in early lactation is inevitable as feed intake cannot meet the energy demands of peak milk production
Pre-partum dietary management (cation-anion balance, calcium reduction) significantly reduces transition disease incidence
Cow comfort in the close-up pen (2-3 weeks pre-calving) directly affects transition success - overcrowding and inadequate lying space worsen outcomes

Welfare Considerations

Transition period diseases cause significant animal suffering that is often severe and occasionally fatal. Milk fever causes complete inability to rise, with cows lying unable to move for hours before treatment. Ketosis ranges from subclinical (causing pain sensitisation and reduced welfare indicators) to clinical (causing neurological signs, anorexia, and severe weakness). Displaced abomasum requires surgical correction under local anaesthetic. Metritis causes systemic infection and fever. The interconnected nature of transition diseases - hypocalcaemia predisposes to DA, which contributes to ketosis - means that inadequate prevention of one condition increases risk of others. The welfare significance extends beyond individual suffering: transition disease in one lactation predisposes to subsequent health problems and reduces productive life. Preventive management investment in pre-fresh pen conditions and nutrition has high welfare and economic returns.

What You Can Do

Support dairy farming systems with documented low transition disease rates
Ask dairy products companies about their herd health monitoring and transition disease management
Advocate for transition disease rates as mandatory welfare outcome measures in dairy farm auditing
Support research into effective metabolic disease prevention without prophylactic antibiotic use
Choose organic dairy where pre-antibiotic use at drying off is restricted
Donate to farm animal welfare organisations working on dairy cow health improvements