Does she look like this one;Cross your Black Copper Maran with a true Blue egger layer like an Ameraucana or Cream Legbar you will get Olive Eggers. I believe if you cross a Black and a Splash you will get blacks unless your black is splash factored. I could be wrong because Chicken genetics is new to me, but there are project threads you can research. I my "olive egger" who has not laid an egg yet so who knows??? She looks like a Black Copper Maran but is supposed to be a cross between a Cream Legbar and a Black Copper Maran.
Everyone tells me she's a EE but hasn't started laying yet...

