Our run is over cement (not by choice, but has to do... we have a moveable netted run for "ranging", too). The coop is about 6x6 for 3 chickens... and they will have access to this cement bottom run for rainy days & winter exercise (I they are brave enough). I have currently been using hay, to keep this cement run easy to clean, but this gets damp on rainy days (despite a roof), so naturally I am concerned it will become an icy mess come winter... and that even now, the dampness of hay (eeen when cleaned frequently) may not be healthiest. If winter anything like last year, it may be difficult to maneuver in and out as often as I like to keep it cleanest (im quite fussy). Are wood chips a better alternative... or do they pose same problem? Any suggestions?