Quote Originally Posted by moosmom
When you try to introduce kitties, you need to do it gradually. By that I mean, keep the new kitty isolated in a room with her food and litterbox. Take a towel and rub her down with it and let the resident kitty smell her scent. Do the same thing with the resident kitty. After a couple of weeks, put up baby gates stacked on top of each other in the doorway so they can see and smell each other, but Isis will be protected. After THAT, let Isis out SUPERVISED, standing by with a spray bottle in case violence erupts (by violence, I mean bloodshed). Only let her out when you are home and can supervise.

It's not something that will happen overnight, so please be patient.
Well, this is something that I was doing for a pretty good amount of time and never had problems with before now. I was standing practically on top of her which was another reason that I was (not quite so, though) surprised. My mom deduced that she is probably in heat and when the first one jumped on her, he was probably trying to mate, took her by surprise, and she flipped.