So many great ideas on here, but we will stick with the deep bedding method as we are in Maine and the last thing you want to do in the dead of winter is scoop, shovel, etc. Just keep adding your bedding as needed, maybe every couple of weeks. You don't want it to be wet, and when it starts smelling of ammonia, add another layer, and open up more on nice days. Depends how many birds you have, and yes, ventilation is a key, although we have to close up about 80% of it come Dec. If you clean your coop in the fall after your garden is done, you can put it all directly on the empty garden, and let nature take its course, and add any leaves or clippings or anything else. Works like a charm. Everyone has a different method, this worked for us even when we had 70 chickens (downsized to 10) they are thriving and perfectly happy. Just keep their nests nice and clean with plenty of fresh hay or whatever you use, they'll be fine.