I've heard of people using leaves in their coop, but they need to be %100 dry and that isn't always possible for me. So I just use pine shavings inside my coop. Bark chips work great too! Though we don't have a lot of those. I'll have to try mulch sometime!
What do you use inside your coop...
For many of the warmer climates, your chicken runs are probably a muddy mess right now. I know mine was! But conveniently, nature supplied us with the solution at the same time!
Use fallen leaves in your run! I've been doing this ever since I started raising chickens! It keeps the mud down and...