Sand is much harder to clean once it's dirty than shavings. It's much heavier to shovel, in winter it's cold, there's no absorption of poop or dampness, and it gets really smelly. I use it only in the runs or the bottom of a two-level coop where the birds roost up top. I use the deep-litter method with pine shavings mixed with food grade DE. In this winter weather it is hard, I admit, to get out there and stir/shovel, rake it around several times a day so, instead, I toss scratch/cracked corn all around the inside of the coop and let the girls do the stirring. Works very well. I have not cleaned my coop since August or September and it's fine. Yes, there is poop in there, but with the shavings and DE it dries out, settles pretty much to the bottom and acts as insulation against the cold.