I was cleaning out the coop, and i noticed bugs in the poop under the roost. Is this normal? They were like little tiny flies? some were crawling. I checked over my chickens didnt see anything no them. (not even sure what mites look like though). I normally clean the coop once a week and we were at the one week mark. Do i assume since i couldnt find them anywhere else (bedding, nest boxes, run) that they are just poop related???