I would agree with Yorkster...kittys have a way of working things out, and sometimes that means not working things out... If black and white kitty was "sole pet" for a number of years, it's somewhat understandable. Cats are not altogether happy with a change in their environment and they are quite territorial. Appreciate each kitty for its own unique personality. I have a black and white female who is affectionate on her terms, but can also be quite aloof. I often think we live on her terms and not ours - regardless, I love all of her furry little qualities!