My two are both "found" cats and selected through a mutual-adoption process. We liked them and they liked us. One is about 10, the other about 4. One of these years I'll add another cat to the house, because I think it's a good idea to have more than one if you're going to have any, and recognizing the inevitability of the older one going and leaving the younger one alone. My method for introduction is to have them spend time in kennels in the same room, to get used to the idea of the other cat, and gradually let them meet face to face. It gets a lot of the "hissing" out of the way without much of it occurring at all. Oops, I'm dressed for work in dark pants and the calico just hopped into my lap. Means there will be a dust-and-cat-hair removal operation before I head out the door. She purrs her approval of this topic.

SRS