At 17 weeks my Isa brown and my black sex link girls laid their 1st eggs. From my research black sex link only lay brown. Olive eggers lay at 6 months. One site said the color can not change over time. Another site said inside of brown eggs are white, blue-blue and olive are blue cause of the mix. These eggs are white on the inside, olive on the outside laid at 17 weeks by black sex link( watched cameras) so how is this possible?