Ketosis Monitoring in Dairy Cows: Early Detection for Better Welfare

Systematic ketosis monitoring in the transition period identifies cows needing intervention before clinical disease develops, significantly improving welfare outcomes.

Key Facts

Subclinical ketosis (SCK) is defined as blood BHBA above 1.2 mmol/L without clinical signs
SCK affects 40-60% of dairy cows in the first 2 weeks of lactation in many herds
Positive SCK status increases the risk of displaced abomasum, clinical ketosis, metritis, and early culling
Cow-side BHBA meters provide accurate results within 5 minutes on a drop of blood from the tail vein
Automated milk BHBA measurement systems enable whole-herd daily monitoring without individual blood sampling
Propylene glycol oral drenching corrects SCK - treated cows have better health outcomes than untreated ones
Monitoring programs that test all fresh cows detect SCK before clinical signs and enable earlier treatment

Welfare Considerations

Systematic ketosis monitoring transforms subclinical ketosis from a hidden welfare problem to a detectable, treatable condition. Cows with undetected SCK experience metabolic dysfunction that impairs immune function, increases disease susceptibility, and causes chronic discomfort as the metabolic burden escalates. Early detection through systematic testing, followed by prompt propylene glycol treatment, shortens the period of metabolic dysfunction and prevents progression to clinical ketosis. Monitoring programs with threshold-based treatment protocols achieve better welfare outcomes than waiting for clinical signs to trigger intervention.

What You Can Do

Implement systematic BHBA testing for all fresh cows within the first 3-5 days of calving
Use cow-side BHBA meters for individual testing or automated milk BHBA systems for herd monitoring
Treat cows with BHBA above your treatment threshold promptly with propylene glycol
Monitor treatment response with repeat BHBA at 3-5 days after treatment
Track SCK prevalence as a welfare and transition management indicator across seasons
Investigate management factors driving high SCK prevalence (body condition at calving, pre-calving diet)
Discuss SCK monitoring protocols and treatment thresholds with your vet