I'm starting to get concerned with coop odors, dust, etc. that naturally come with having chickens. I don't want to end up with lung disease and I don't want the birds coming down with anything either. I just found out from a thread here about histoplasmosis, and it's a little scary. Any tips on keeping a coop as uncontaminated as possible? We've boarded up for the winter so there isn't as much ventilation as there used to be, when it was half hardware cloth wire. I have been keeping the people door open all day (I don't have a chicken door so the people door is always open during the day) and we left open space at the top walls of the coop for ventilation. Sometimes I also leave the egg doors open for extra ventilation during the day, after everyone is done laying. My 10 chickens free range all day. I guess dust masks are a necessity. Are those the kind you buy at Lowes? Would leaves on the bottom of the coop floor, over the shavings and raked in, help with dust issues? Would hay added to the shavings help at all? Would less shavings on the floor of the coop help? Do I need to totally clean the poop out every day? I've only been spot cleaning, maybe that's not enough. Up until now, I've only obsessed over the design and size of my chicken coop. But now I'm starting to obsess over its cleanliness. I really want it to be odor free, and I don't want to feel like my lungs are getting filled with bacteria just by walking into the coop. Any thoughts on keeping a coop clean, healthy, non-toxic, and eco-friendly?