since it is in on a cement floor i was also considering doing sand/shavings or sand/straw combination...thinking the sand would help with the moisture? As far as the window...it's an old barn window that I do not own that has all the glass panes knocked out so I obviously cannot close it. Any ideas on the sand combo and if that would work better than just plain straw or shavings? and if so...which should I layer first?