I notice with my mutts that pullets don't have tail feathers when cockerels have them. But those are all from same genetics and chickens so you can't use that with everything. If one of your EEs ends up being roo, I read that chicks with pea combs will lay blue/green eggs (not roosters of course

) but I haven't bred EEs yet to mine so don't know. But the ones that get the blue gene will layblue eggs. And I don't know if this will happen, but green eggs (or atleast some of them) are blue eggs with brown pigment over the blue. You can scratch off brown to reveal blue. So some of them might lay green eggs, but like I said before I haven't bred those yet so don't know. I think
@cherrynberry breeds them.