I was afraid of that too - my place is a teeny-tiny one-bedroom, but somehow we managed to keep Mishi in the tiny bathroom with food, water, litter and a fluffy rug to sleep on. It wasn't ideal, but it was the best I could do. Once or twice a day I would lock her in the bedroom and let him investigate his new home. I could only do it for about three weeks because he gets very ornery when he doesn't get his way and was starting to balk at being locked up. Now he thinks the bathroom is HIS room. He still goes running to his safe haven when he gets scared.

Ideally it should take about a month to six weeks to introduce them and finally leave them alone together. I did rush things, but neither one seems worse for the wear. Well, maybe Mitzi, she's upset that Mishi doesn't like her new scent. They'll get over it (I hope!)