I have two large "small animal" cages laying on their back as "teen" brooders or for other confinement needs. They are something like this except with only two of the smaller side shelves and no duplex separator. I put the side shelves against the bottom tray to keep it from falling when I put the cage on it's back. Mine are about 3 ft wide x 4 ft long laying down, so I have about 12 sq ft of space for my chookies, which I have found is good for 10-12 "in between" birds. These cages fit in my large coop or in our roofed dog pen (without the dog, of course), depending on what I need at the time. They can walk on the wire, but I pile litter over it to make them more comfortable and keep their toes from getting caught.