FIV (feline immunodeficiency virus) and FeLV (feline leukemia virus) are two of the most commonly diagnosed feline viral infections. Both can have serious health consequences, but both are also manageable with proper care — and cats with these conditions can live long, full lives. Understanding what these diagnoses mean reduces the fear and misunderstanding that leads many owners to unnecessarily surrender or euthanize otherwise healthy cats.
How These Viruses Spread
FeLV spreads through prolonged close contact — sharing food and water bowls, mutual grooming, and bite wounds. It does not survive long in the environment and is not spread through casual contact or human hands. FIV is primarily spread through deep bite wounds — the kind that occur during serious fights between outdoor cats. Casual household contact between cats, including sharing litter boxes and food, is very low risk for FIV transmission.
Living with FIV+ Cats
Cats with FIV can live many years with good care. The virus weakens the immune system over time, making infections harder to fight. Keeping FIV+ cats indoors prevents exposure to pathogens and prevents transmission to other cats. Feed a high-quality diet, minimize stress, and see a veterinarian promptly at the first sign of illness. Annual checkups with blood work become more important as the cat ages.
FeLV Management
FeLV is more serious — it suppresses the immune system and also increases risk of lymphoma and other cancers. Many FeLV+ cats die within a few years of diagnosis, though some live much longer. Positive cats should be kept indoors to protect their compromised immune systems and prevent spread to other cats. Regular veterinary monitoring with blood work every six months is essential.