And don't forget, 4-feline house, that cats - pets in general, actually - are beneficial to your health. People with pets live longer than those without! And then there's Mr. Cat from a week ago http://CatoftheDay.com/archive/2001/February/15.html who alerts his diabetic owner - one of your kitties might do the same thing if it came down to that! So it is a good and happy thing that you have not one, but FOUR chances for your own health and life to be extended walking around your home and helpfully shedding on the furniture!