Neonatal Calf Scour and Welfare Management

Neonatal calf scour is the most common cause of death in calves under 30 days of age, representing a major welfare and economic challenge across the cattle industry.

Key Facts

Calf scour causes approximately 50% of all calf deaths in the UK — affecting both beef and dairy herds during the calving period
Rotavirus, Cryptosporidium, Salmonella and E. coli K99 are the primary infectious causes in UK herds
Dehydration is the primary welfare and mortality cause — calves can lose 10-12% of bodyweight in fluid within 24 hours of scour onset
Oral electrolyte therapy is the cornerstone of treatment — IV fluids are required for severely collapsed, acidotic calves

Welfare Considerations

Calf scour imposes rapid, severe welfare deterioration. Dehydration causes weakness, recumbency and acidosis within 12-24 hours in severe cases. Scouring calves experience abdominal pain, cold extremities and progressive weakness — clear welfare signs that require immediate recognition and response. Oral electrolyte rehydration therapy, when initiated early, prevents progression to severe dehydration and significantly improves welfare outcomes. Prevention through vaccination of dams (Rotavec, Bovilis) and environmental hygiene (Scour Fence protocol) reduces outbreak incidence substantially.

What You Can Do

Implement dam vaccination against rotavirus and E. coli K99 in the final 3 weeks of pregnancy in herds with scouring problems
Begin oral electrolyte therapy within hours of scour onset — do not wait for severe weakness before treating
Assess hydration status using skin tent test and suckle reflex to guide oral versus IV fluid selection
Segregate scouring calves from healthy calves immediately — rotavirus and Cryptosporidium are highly contagious