There is a little thing to help with the smell that I stumbled upon completely by accident. I had a brush pile in my yard for a while and finally got around to burning it. Anyhow after it burned down and put the rest out with water, I left the ash and leftover black bits for the girls to dust bath in. Well they decided to eat the charcoal bits,there was a black poop epidemic. Concerned it would hurt them, I did some research. It seems that charcoal was regularly fed years ago to aid digestion and filter toxins from them. As far as I read it was a general barnyard practice for all livestock. But the added result was a poop with no ammonia smell as the charcoal neutralized the smell. The chemical reaction turns the ammonia to ammonium which is less harmful as less aromatic. The past couple of weeks I had noticed that the coop was devoid of that coop scent never realizing the cause until I stumbled upon the black poop and charcoal research.