Well, Boo, my 11 month old tabby, was just welcome by my adoption of a 12-week old diluted tortie, Bella. I did what I think is the right introduction, separate rooms and slowly bringing them together. Bella is a joy - purrs constantly, very loving and very playful. The two of them play alot, mostly Boo chasing Bella and sometimes the reverse. When they are "biting" each other, how do I know if it's in play or if Boo is actually trying to hurt? Also, Boo is not as affectionate with me right now - it's like she is mad at me for bringing in a new kitten. I am giving her more attention than Bella but it doesn't seem to help. For example, when I lay on the sofa to take my nap, Boo use to hop on top of me and sleep, she is not doing that any more. HELP!!!