While feline immunodeficiency virus (FIV) infection is well known as a cause of illness in cats worldwide, little data has been available about infection rates in Canada. In this retrospective study, 1205 client-owned cats in western Canada were tested for FIV antibodies. 5.5% of the cats were FIV-antibody positive. Infected cats were more likely to be males, to have bite wounds, and were older than antibody-negative cats. The survival time of FIV-positive cats was not significantly different from age and gender matched FIV-negative cats. This research adds to the knowledge that veterinarians in Canada need to develop testing and management plans for FIV. [SL]