We have 6- 6month old pullets. One of them has a bare butt, but only on the right "cheek" and we do not have a rooster. Does any one have a suggestion as to the cause and cure if needed. No "strange" behavior seems to be happening. BTW the coop floor is sand with a layer of hay in case it matters. We usually get 4 eggs per day from our six chickens. But today, one of them stayed in the nest for a LONG time, but no egg. Then she or another one (and we don't know which ones are which) got up into the same nest and spent another period of time, but still no egg. Any thoughts on this?