One of the chicks we bought this April turned out to be a rooster and we'd like to keep him. Up until today he has behaved himself with crowing but this morning he was going at it at 6am from inside the coop. I live in the Bay Area CA and so haven't needed to insulate the coop so it's just plywood walls. Any suggestions on how to soundproof it? Cork walls? Padding? Insulation? I'm open to all suggestions. Thanks!