FELINE IMMUNODEFICIENCY VIRUS (FELINE AIDS)
Lucky: I was reading one of the pet magazines while I was sitting on book rack, Ducky. Did you know that cats can get a very sick from the saliva of FIV positive cats?
Ducky: Why? What happens?
Lucky: Cats that are prone to getting into fights with other cats, especially roaming unneutered males, are most likely to get Feline AIDS. It's a virus cats can get and it's very similar to HIV in humans, although it can't be spread to any other animal or human. There's also a vaccine owners can get done if they think their cat is prone!
Ducky: So what happens when a cat gets FIV? :O
Lucky: Well, Lethargy, a decreased apetite and fever is common for the first few months. After that, it's pretty serious! Due to a weakened immune system, infected cats can get mouth and respiratory infections, cancer, intestinal and fungal diseases, eye and nervous system diseases, and leukemia (not to be confused with Feline Leukemia Virus though!)
Ducky: Well, I'll be sure to keep away from any cats while I'm out chasing the crows!
Lucky: Some day Ducky, those crows are gonna give you a piece of your own medicine... :P