I've been reading a lot and actually did the recommendations when introducing my kitten #1 now 9 months to kitten #2 now 7 months. It did take a bit of time but they are now best of friends. I am thinking of adopting a third kitten and what I haven't read about is when you have 2 you are introducing to a new kitten - should they all be introduced together? Or should I arrange for each to meet the new addition separately? I will be keeping the new addition in my bedroom at first and will probably do some sort of a screen so they can see each other after a few days, but not be able to touch. My female calico is the boss and I expect the most hissing from her. My younger male tabby follows his sister's lead. What are your thoughts?