My chicks have been in their coop since late September, and I've been proud of the way it never really smelled, until maybe the last ten days. I'm wondering if my young chicks, which are probably just on the eve of laying their first eggs, are going thru some sort of hormone shift that has them suddenly stinking to high heaven. Coop is well sized to the flock, and filled with 4" to 6" pine shavings. I did a complete change-out of the old pine shavings last weekend, thinking that would resolve it, but just three days later it's starting to smell again. I've always kept an inch of PDZ in the poop tray, where they do about 99% of their pooping, and sifted it with a kitty litter scoop every Saturday. Not ideal, but I'm not home during daylight hours during the week, and can't really kick them off the roost at night to clean the poop tray. There has never been an odor issue in the past. Some friends who have owned chickens in the past just tell me that's the way it is with chickens, and I shouldn't expect it not to smell, but I was so happy with the way it hadn't smelled bad over the last four months. Should I just live with it? I can't figure out how to describe the magnitude of smell in words, but I can say it's not pleasant!