I was actually mooned by my Black Sexlink hens! Three of the six have the barest, brightest pink, bare butts I have ever seen! I only noticed it yesterday but I know they haven't been that way for long. What could be wrong? They already went through the molt stage. There are no other chickens in the pen with them. They have been laying for about two months.They are healthy and happy and fat chickens! I just can't figure it out! I need some help please it is cold in NC and they don't have any insulation back there!