Yesterday, I noticed the girl's feeder getting a little low. It sits on the ground under the coop. I picked it up, and there was mold under it! Anna and Gidget came over and started pecking the mold. I shooed them away and went to the storage shed, got a rake, and raked it up. I made sure it was all gone to make sure they didn't peck it. How can I prevent this from happening again? Is their any sort of chemical I can put on that spot that is safe for chickens?