I like the sand so much that I put it in the coop, its so much easier to clean out the poop and it doent smell like pine shavings. I think the ammonia gets smothered by the sand. I was wondering though if it ok to use in coop, it does get a little cold. The chicks are 6-7 weeks and arnt yet using the perches (2X4's) yet so they sleep on the sand at night. Are they smart enough to go up on the perch if they get cold from it? You know what funny is they have me trained now. Each night if the coop is not open (been working on it so they get locked out) they start chirping loudly. This usually happens around eight and they will do this until I let them in. They get real real real loud too.