Livestock

Coccidiosis in Calves: Welfare and Treatment

Managing Eimeria infection in young cattle to prevent welfare harm from bloody diarrhoea.

Key Facts

Coccidiosis causes haemorrhagic diarrhoea in calves 3-6 weeks of age
Eimeria bovis and Eimeria zuernii are the most pathogenic species in cattle
Overcrowding and poor hygiene dramatically increase infection pressure
Diclazuril and toltrazuril are effective treatments and metaphylactic agents

Welfare Considerations

Coccidiosis causes acute welfare compromise — haemorrhagic diarrhoea, abdominal pain, and rapid dehydration. Severe cases cause neurological signs and death. Welfare-focused management maintains low stocking density, implements good hygiene protocols in calf housing, treats affected animals rapidly with appropriate coccidiostats and fluid therapy, and uses metaphylaxis in high-risk groups.

What You Can Do

Monitor calf groups closely for bloody diarrhoea — coccidiosis requires prompt identification
Implement strict hygiene in calf housing — clean water troughs and bedding reduce infection pressure
Consult your vet about strategic treatment in high-risk groups before clinical disease occurs