I found this article about werecats on www.therianthropes.com, I thought it was interesting. I hope you do to. If not... beware of shapeshifters.
In folklore and fantasy fiction, werecats are shapeshifters who are similar to werewolves, except that they turn into some species of feline instead of a wolf. The species involved can be a domestic cat, a tiger, a lion, a leopard, a lynx, or any other type, including some that are purely fantastical felines.
The word "werecat" was not coined until the late 19th century, so it was not directly used in legends from earlier eras, only by later folklorists' commentary.