I'm not new to chickens but am a returning chicken'er after a 25 year absence. I have one old red hen (red sex link) and 6 supposed pullets from this year; March. Of that group, Three Buff's, one golden sex link, a red sometingorother, and one Americana. I am getting 4 to 6 eggs a day. Keep that thought. Six eggs tops. I was cracking 3 for a cake this morning and low and behold, there's a spot that just might be from a masculine source. Also, I just made cornbread and there was a white spot on that yolk, too. None of these chickens run loose. None of them are sprouting flowing tail feathers and none of them are crowing. Without a doubt the Americana is a little girl. I have the blue/green eggs to prove it. Is it possible that these white circles are where the yolk was released from the ovary?