I had a cage with a wire metal bottom. I ended up putting in a piece of the cover from a light in a drop ceiling. Like plexiglass, acrylic, etc. I still put some bedding in there for her since she isn't potty trained and a piece of granite tile to cool on (though I've never seen her sit or lay on it.). I was afraid that a bunch of tiles would just bend in the center of the floor from the weight.