[QUOTE]Originally posted by sasvermont
[B]I have a cat door leading to the porch. (Sure hope Gabe can fit through it this winter!)

LOL! SAS!

I think each cat added in has the potential to upset the apple cart. As for me, my limit is two. They share their home with a dog and made a beautiful adjustment a year and half ago when Bella came to live here. At this point I wouldn't push my luck. My two enjoy each other's company and don't do any of the territorial things, like spraying or going outside of the litter box, because they are on equal footing with each other. For someone else, who is maybe a bit more of a risk taker than I am, more cats might be totally manageable. My first concern though is compatibility and then next is the financial responsibility, not to mention the added work involved in keeping things clean, etc. My two can produce enough hair in my vacuum cleaner to stuff a pillow each week!