Cat FeLV Management and Quality of Life

Feline leukaemia virus, while serious, allows many affected cats to live comfortable lives for extended periods with appropriate management and monitoring.

Key Facts

FeLV is a retrovirus that suppresses immune function and predisposes to lymphoma, anaemia, and secondary infections.
Around 30% of persistently infected cats remain healthy for 2-3 years after diagnosis, with some surviving longer.
FeLV-positive cats should live exclusively indoors to prevent spread to other cats and to reduce exposure to pathogens.
Vaccination is highly effective at preventing FeLV infection and is recommended for all cats with outdoor access.
Antiviral treatment with feline interferon omega shows modest benefit in some cases of FeLV.

Welfare Considerations

FeLV-positive cats are sometimes euthanized at diagnosis based on outdated information about inevitable rapid decline. While FeLV is ultimately life-limiting, many infected cats can enjoy good quality of life for significant periods with appropriate supportive care, indoor management, and monitoring. Welfare for FeLV-positive cats means treating secondary conditions promptly, maintaining a low-stress indoor environment, and monitoring regularly for early detection of complications.

What You Can Do

Do not euthanize a FeLV-positive cat at diagnosis — discuss prognosis and management options with a veterinary internist.
Keep FeLV-positive cats exclusively indoors and avoid introducing them to other cats.
Vaccinate all outdoor cats against FeLV — the vaccine is highly effective and prevents this life-limiting infection.
Schedule twice-yearly wellness checks and blood monitoring for FeLV-positive cats to detect complications early.