I think I understand it. You get shades of green from crossing a brown egg layer type bird with a blue type. and an olive egg comes from a cross with a dark brown egg layer , but my question is WHEN do you get the olive eggs? Is it immediate in the eggs or do you have to hatch out chicks and wait for them to lay to get your green and olive. INquiring minds want to know... ps...FWIW... There's a tall dark and handsome BCM rooster waiting to meet my EE ladies.