Our 5 white leghorns get quite loud when wanting to come out and singing the egg song. I feel our coop produces resonance since the walls are plywood(we have yet to paint the outside) and the front door is large and just has wire mesh. The coop floor is also wire mesh so poop falls through. If we decide to soundproof it'll be difficult since the coop is done. What is the easiest and cheapest way to put sound absorbing material within the coop?