I have been back and forth on the sex of one of these two. One I am 100% sure is a roo. The other I'm back and forth on. They are about the same age, approximately 21-23 weeks. I was convinced they were both roos but one was just a slow maturing. Then a tiny dark egg showed up in the egg box today so now I'm wondering if I do in fact have a pullet. I have other pullets in that coop but none should lay that dark of an egg except a marans.