Well, Sissy is still hissing & swatting at new kitty Squeak. It's been 3 weeks. Not to say they don't have their moments. The occasional butt sniff or close proximity to one another without altercations. But, we have also seen Sissy get poor little Squeak cornered and goes into a swatting frenzy. It doesn't seem like Squeak has ever been injured, no cuts, fur flying or crying even. But the confrontations sometimes look bad. We have them together only when we're home at this point, Squeak is in her room at night and while we are working. Is there a way to tell when they're ready to be alone in the house together?