I use pine needles from our side yard, coop smells like Christmas, we use pine chips for babys, we have a camper someone gave us 27' but that has 22 chickens in it and we have 23 peeps to house now, so we have started a new one right now we have peeps in our screen house with a small run. our camper coop is all fixed up and they love it, they go under it but this time I want to fence it so they can not get under it.here is our coop we have nowI use pine shavings and stall fresh. Makes clean up so much easier and the stall fresh keeps the smell down.