I had two for a short period. A neutered male about a year old, and a 6 week old girl. I had to get rid of the baby girl just as they really started to get along. I socialized them through a closed door. The kitten had only one room where she was kept. I would allow them to talk through the door and have face time when I was home only. I increased their face time as they could be trusted without the baby ending up covered in spit from being attacked.

It took about 6 weeks before they would curl up and nap together in a chair.

Unfortunately, she did a number on my allergies and I had to give her up. My male is about 3 now and is aggressive and possessive and unfriendly. Not sure I'd try to add another with him anytime soon.

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When you get to the end of your rope, tie a knot and swing.