No matter how much you clean when you have animals things get dirty. Styrofoam is very messy especially if you cut it yourself. IM sure he wasnt thinking of sweeping up before he took the pic. Just becasue you see some aspen on the floor does not mean someone is a bad keeper or they dont clean there animals. I have seen plenty of pictures and videos of large scale breeders that take GREAT care of there animals but might have some aspen or something on the floor. I use newspaper and when I clean my cages I still usually end up with something spilled out on my floor.