Hi. We have had challenges with our crowing boy. No laws have been broken, just our neighbour is a moan. So most recently moved him from box in coop to a custom built black out box in garage. JASON is such a friendly boy. We tried various box sizes and no crow collar. Still crowed even in the smallest box. I've added pictures of box to be of help to anyone else. Cost 42l box £7.00 larger box £15.00 paper insulation £18.00 and then water pipes and attachment £8.00. You could use spray foam but may need a few containers. So noise is completely inaudible from outside......