I noticed today that part of the ground in the coop's yard is turning white. I assumed it's mold and I tried to scrub it off and then I smelled this horrible stinging stench. It isn't hairy or anything, it just looks like the ground is turning white. Same thing on the roof, but there it looks like it's sprinkled if that makes sense. It's weird because everything is ventilated as it's outside. We had about 1 week of rain and high humidity so that might be the cause. How do I get rid of it? Are there any sprays that aren't toxic for the chickens?