Similar to HIV in humans, FIV (Feline Immunodeficiency Virus) causes weakening of a cat’s immune system and is most commonly transmitted through a deep bite wound from an FIV+ cat to another cat. With proper care, FIV+ cats can lead a normal life. Sanctuary One currently cares for up to five FIV+ cats in our William Driscoll and Alicia Theophil FIV Cat Cottage. Learn more about FIV.