Feline immunodeficiency virus is manageable with appropriate care, allowing FIV-positive cats to live good-quality lives for many years.
FIV-positive cats experience gradual immune decline that makes them more susceptible to secondary infections. With appropriate management - indoor housing, regular monitoring, prompt treatment of infections - many FIV-positive cats live for a decade or more in good health. The welfare impact is primarily about secondary infections and their treatment burden rather than the virus itself in well-managed cats.