I have a female calico cat, two and a half years old, and recently adopted a female russian blue mix (fixed, about two years old) from my brother in law when it didn't work out with him. However, my cat, Caramel, just refuses to accept this new cat, Bluebell. It's only been a month, but when we don't have them separated, Caramel absolutely tortures and terrorizes Bluebell, while Bluebell just seems to take it. She'll swipe back every once in a while, but not enough to do damage, and she certainly never initiates it. I've left it alone for the last month, but today, there's a long (shallow) scratch along Bluebell's nose, and so I'm becoming more concerned that Caramel's aggression may be escalating. Any suggestions?