We have 1 bird who was acting strangely for about a week. She disappeared then reappeared...was very lethargic and kept away form the other birds. Egg production all but ceased for a few day and then we found this. I can't be sure which chicken produced this egg ( we have 3). But I know it was 1 of 2 as we only have 2 Barred Rocks and they produce brown eggs. Regardless which one produced this egg I would like to know what it means, if anything.