When you see a bullseye in the egg to check fertility, is there supposed to be a white dot in the middle? I have a silkie egg I swear looks fertile, but was told by another breeder, that mine have white in the middles and that there should only be the ring. There are no males in the coop/pen, I am 100% sure. There are 5 sexlinks, and the 2 silkies. Both silkies lay.