I think I probably just have a sensitive nose. I only have 8 hens that are kept in a 12 x 12 coop with an outside run the same size. We just built the coop/run when we got the hens as baby chicks back in March so it is not an old environment. It has a sand floor that I use a kitty litter scoop on twice a day. Plus it has a fan in the coop that I am still running since I am in Texas and we havnt had cold temps yet. Plus the humidity is up slightly. I just love my chickens,.....But that smell gets in my head and stays even after I have left the coop. Any secrets to improving the smell in the coop?