Companion Animal Welfare

Companion Cat FeLV Prevention Advanced

Feline Leukaemia Virus (FeLV) causes progressive immune suppression and cancer in affected cats. Vaccination and preventing exposure through managing outdoor access are the most effective prevention strategies.

Key Facts

FeLV is the leading viral cause of death in cats worldwide
FeLV is spread through saliva, primarily through prolonged social contact and biting
Effective vaccines are available and highly protective when given to unexposed cats
Outdoor access significantly increases FeLV exposure risk
FeLV-positive cats can live good-quality lives with appropriate management but carry ongoing welfare risks

Welfare Considerations

FeLV causes progressive immune failure, anaemia, and cancer that significantly reduces quality and length of life in affected cats. Prevention through vaccination and limiting exposure by managing outdoor access is far more effective than treating established infection. Vaccinating outdoor cats and testing any new cats before introducing them to FeLV-negative individuals prevents most transmission events.

What You Can Do

Vaccinate outdoor cats against FeLV from kittenhood
Test any new cat for FeLV before introducing to existing cats
Discuss indoor management as a prevention strategy with your vet for high-risk cats