I was reading another thread here on illness and came across a lot of people seeming to be having the respiratory issues a lot of us have been dealing with. One person posted this link. I am going to get some of this and do the whole coop in the spring and even the ground. I found it a very interesting read.
http://www.shagbarkbantams.com/oxine.htm
http://www.shagbarkbantams.com/oxine.htm