I have been reading all the posts about bedding, wood shavings, etc and am confused! My run is a concrete/soil floor. Is sand with DE best to use? Sounds like sand makes for easy cleanup. Or should I use the shavings in the run too? Shavings seem messy for the run. I want my girls to be happy, but I want easy clean up to be sure there is no smell for the neighbors. (and to get my Husband to help on occasion!)