a compact shelter includes a base and a plurality of interchangeable roofs mountable to the base . a flat roof may be provided with a railing and a series of steps leading to ground level to provide a pet with easy access to a raised resting area . a sliding front door and sliding internal partitions may be used to subdivide the shelter into a plurality of internal compartments . an improved cross ventilation system is provided along with a no - tangle leash assembly . sloped floors leading to a drainage aperture facilitate cleaning and flushing of the shelter .