We use two or three sections of caging that fit together for the cage at the barn site. It is 2 feet wide by 6 feet or 9 feet long with a door at each end. The feeder/waterer is at one end and the litter box at the other end. The hidey box is in the middle – two boxes are used when 2 or 3 cats are in the same cage. A rug is included in the winter months and a plastic tub with a hole for a door is used for the hidey box. The small carrier is used in the summer for the hidey box. The cat already has their smells in that box and it is a much more comfortable experience for them. If the cats come in together, then they go out together.