I added peat moss to the run and to a covered / screened area where the chix have their door. They love it they can bury in it to keep cool and dust off - Peet is very inert and is not a good habitat for anything that might be bad.
I just fixed the smell in our coop and run. Up until this year we never had an issue, however the number of birds (13) and the endless spring and summer rain and the shade from vines on the run all combined to produce a constant and pervasive odor. The neighbor closet had guests today and...