How do cats catch FIV?
Usually cats catch FIV by fighting and biting an FIV infected cat, this is why the most at risk groups of cats are entire males and stray/feral cats who are always getting into fights. Middle aged and older cats seem to be more commonly infected than young cats. Kittens born from an FIV mother are not always infected with the Virus. It seems most kittens who get the virus passed on from the mother are infected at some point after the birth, through the mothers milk, washing or when the mother cat bites through the umbilical cord.
