I have to agree with Joan. I first used shavings from the local pet store. When I got out to the feed store, I picked up fine shredded pine shavings because it was cheaper. I use that in the coop and noticed that the poop sticks better to it, making it easier to scoop up. I add to the pine shavings about once a week, but have not completely cleaned out the coop floor. My chickens have been in the coop for about a month now.