A Janus cat is a genetic mutation in which a cat is born with two faces. It's named after the Roman god, Janus who was portrayed to have two faces. They usually will not live long. Even if they did survive, the mothers will often kill or abandon a kitten with such deformities. Thankfully, the condition is very, extremely, and outstandingly rare.
Note[]
Only 3 cats in the world ever had the deformity; these include Frank and Louie, Duo, and Bettie Bee.
Frank and Louie.
Duo.
Bettie Bee.