i have a RIR and a bantam frizzle. All of the sudden my eggs from the RIR have been dirty. its just them in the coop and they have a roost, which they do perch in at night. Its only the RIR eggs that look like they have poop/ dirt on them, not the frizzle. Its not that dirty but its definitely noticeable and not as clean as they were before, any suggestions on why this could be? thanks