Even the biggest cat fanatics may not have heard of feline immunodeficiency virus (FIV). The RSPCA's cat welfare expert, Alice Potter, said the organisation often describes FIV as being "like HIV ...

Feline Immunodeficiency Virus (FIV), commonly referred to as feline AIDS, is a chronic and progressive viral infection that weakens a cat’s immune system. It is a lentivirus, meaning it is a ...