I have 4 crates lined up in the living room. They are left open during the day and they can go in and out of them as they please. They also have several beds throughout the house. Nacey, Nova, Charlie, and Buster all get locked in their crates at night, or baby gated in the kitchen. This way they don't bother the cats and the cats don't bother them. Bitsy either sleeps in bed with us or in the kitchen at night.