I go down to Hechinger's and pick up a few squares of tile w/ the sticky back and put that down on the floor and also on the upper levels of our cages. I then use silicone to seal the tiles together. It makes it safer for my fuzzies in that they won't get there nails caught in the wire and it is much more comfortable for them. It also makes it much easier to clean their cages. I get the tile squares for .89 (cents) a piece. If they need to be cut down to fit, just use your hairdryer to soften them up a little bit and it is very easy to cut with sissors. [Posted in FML issue 1144]