I don't have a large house by any means.  But there's plenty of room for three cats and two humans.  In addition to our first floor, we have a basement, an upstairs, and an attic space.  

If our four-legged children wanted, they could divide the house up into sections and never see each other.

Instead, they follow each other around the house in a slow-motion chase.  Every now and again the chase is interrupted by loud hisses and swats when one cat catches another unaware.  

They stop for a moment, ...