Rosie (sigh)

Now that Rosie has come downstairs and is roaming more we have a problem.
She is a sweetheart of a cat with people, but when it comes to other cats she is, and it pains me to say this, an evil, mean, vicious witch!

I've seen her fly up half a flight of stairs and down a hallway to attack Smoke while he was using the litter box. She's flown across a room to attack pepper while he was sleeping in the sun. She sits on the stairs and will not allow any cat upstairs or down unless they run a gauntlet of claws and teeth.

Help me here people, or she's going to have to live locked in a room or in a crate.