Ditto what Slick said. Scoop two boxes twice a day (if I remember) Clean/change the litter boxes once a week. I know all cats are different. My two seem fine with this arrangement. Doesn't take me that long - scooping takes less than 5 minutes a day; the cleaning/changing thing takes about 15-20 minutes once a week. The vacuuming every other day is another story .... Oh well, I love my little poopies!