We have 4cats in our snoozy. We have the large size cement mixing pan from Home Depot in the underbed storage filled with ultra light
clumping litter and it's scooped 3 times a day. Our Omega cat has marked in the shower so we are going to put a small, regular sized litter pan in there. Bad enough to sometimes request DH to hurry up his "sitting and thinking" on occasion, be durned if I'm going to fight 4 cats for access to the one toilet.