Ok Ive never actually had introduse an adult cat into my group before. Even though Annie was an adult when she came to live here my other cats already new her because they would go over to my parents house with me. But now Ive got Nazumi. Hes very easy going and doesnt seem to mind my sisters cats hissing at him. He just sits there looking slightly dumb and then continues on his way. But my girls are umm howdo I put it less then easy going. Kitten will slap and slap. Annie will full out attack if she doesnt like the other animal. Lily hates all other animals. So how do I introduser them properly?