I know this doesn't fit into the "theme" of my blog, but I'm curious to know if anyone has experienced anything similar to this problem. I have an 9 month old kitten, Daisy, whom I love to pieces; I adopted her when she was 12 weeks old. She is very affectionate and sweet only towards a select few: me, C (my love), and my best friend. When anyone else comes over, she watches from a distance. Anyway, I started to feel quite guilty leaving her to go to work, school, etc. so I began looking for a little playmate for her. I adopted Nala two weeks ago today, now a 10 week old kitten as a little sister for Daisy. They have been separated at all times except for a few supervised meetings. For the first 5 days, Daisy would hiss and growl at Nala when I let them "play". Now the roles are reversed and Nala is hissing and growling at Daisy. I'm not sure if they're playing or fighting when they interact. Daisy will chase Nala around the house, and then Nala will hide and jump out and Daisy, then chase her around. Here's the concern: Daisy pins Nala down and bites her; in return Nala bites back. There is never blood, but it results in Nala hissing or growling. I was advised by the vet to keep them separated for two weeks, which is today. Last night was their last "meeting" and nothing has changed in terms of the biting and hissing. Each time Nala hisses or growls, I separate them. The longest time they've spend together in a room is about 5 minutes. I'm hoping they will someday be friends. Has anyone else experienced this or have any advice?