Thanks for the advice, covering is definitely going to be the first thing we do, it's the one thing everyone is saying to try.
I had straw in them but they didn't seem to like that so I switched it to shavings. In the pic I posted I hadn't yet filled them. If I had left them empty, I wouldn't blame them a bit for not liking them!! I wouldn't either! Lol
Ah... I missed that in the first post.
I have hardwood fuel pellets (that have mostly broken down to saw dust) and Stall Dry on the floor of my coop and straw out in my enclosure (Kansas City Ordinance does not permit free ranging), so I used what I raked up after de-thatching my lawn. Basically fluffy mounds of fine, soft, dried grass.