I started with chickens in the coop in April. Have occasionally added chips as needed if looked dirty or less height than previous. Last week, I smelled slight ammonia smell for first time. So now end of September, I just emptied out the coop and started with 2 new bags of chips. Does this timeline sound right? If it works that way this winter, I would clean out on a nice day in late Feb or March. Thanks for answering, every time I have a 'first' I feel like I need to have some reassurance. It was very clean until this week. In fact my husband asked how many times I have cleaned it out so far, he assumed I had cleaned it out during one of my days off during the week.