This seamless, thermo-neutral design can be used for rabbits, small dogs, cats and a bunch of other critters. It has a sliding partition that allows access to both sides of the cage. 

Another seamless thermo-neutral design. All parts slide out for easy cleaning. External liter boxes make it easy to change, even with the kitty from heIl. External litter boxes can be also be used as transfer boxes.

Individual cages with their own waste pans can be removed and used independently from the rack