Heh... seriously. I only have two, but I'm sure they shed enough for four. At any rate, I regularly find enough cat-fur to create a couple more cats. Add into that the fact that Frazer and I both have long hair (his half-way down his back, mine waist length) and I spend a lot of time with the vaccum cleaner upside down pulling a rather disturbing mix of cat and human hair from the spinner. I really miss our hard-wood floors from our last apartment. Sooooo much easier to deal with the shedding of both quadrupeds and bipeds.