I am aware EEs do not conform to breed standards, and I know most feed stores mistakenly label their EEs as 'Ameraucanas'. From what I have seen most hatcheries label their EEs as Ameraucana/Easter Eggers, indicating they know they are mutts, but are of recent Ameruacana stock.
Personally, I am more than happy with my EE's mutt status. I like that they benefit from hybrid-vigor, and I am having fun watching them grow, trying to guess at what coloration they will have.
If we're talking
TSC, they will only label what they get shipped to them from the hatchery. (which is usually why, imo, they don't really know what they are selling, but will tell you what's on the packing slip). Our one feed store orders from the same hatchery, and they, too, are sold as Ameraucanas, but are EEs.
Some people are very, um, particular
about their breeds and what makes what. I guess if you are a breeder and shower, that would matter. I just like me some eggs and
my girlies, so I don't fall into that camp.
Asfik, you can get olive eggers by breeding things like cucko marans to EEs to get the olive egg. But EEs are bred in hatcheries by EE parents, which is why they end up as EEs and not meeting either the Ameraucana or Araucana breed standards. One of my EEs is an olive egg layer, and she has no beard or muffs.
I, personally, don't care what they actually are, because I just
the pretty eggs!
And, while I like the surprise of what colored eggs I'm going to get, I'll admit to being disappointed when one of my EEs laid a brown egg. In the end, it feeds my chicken math addiction, because now I'm going to get more EEs!