I loved using sand in my coop, but at least once I year, I had to dig out THE most foul (fowl?) smelling poo cement you have ever encountered. The top would stay pretty dry, but any liquid would settle down into the compacted sand below, and come spring, I had a disgusting, stinky, tough job ahead of me. Compounded by what I should do with all those slabs of compost sand. . . you can break some up and put it in the garden if you can stand the stink, but what about the rest? Gross. Will have to try the larger sand next time around; I did use the coarse stuff from a home center, which I guess was not coarse enough. I got a kitty litter type scooper on a long handle to sift out the poops - worked great!