Sumi - I didn't get a walk in coop. The composted wood chips I pile in there dry out and get dusty. Call it bedding. When I rake this out, pile it up and wet it, things get hot quickly. I'm adding more composted wood chips, yard waste and cardboard.
If you have the luxury of a walk in coop...
Chicken manure has a lot of "green". Should be mixed 2-4 parts "brown" with 1 part "green". Mix well. If you turn it after it heats up, you should be good to use in 6 months. If you don't mix, let it sit for a year.
I use wood chips and cardboard for my browns. Leaves and such are also good.