Well I tried to copy & paste the description.. but if you read it.. they say
"our Ameraucana are sold as a mixed flock only"
So they're trying to claim they're the real deal but stated they DON'T breed to the standard of perfection for any specific color variety"..
https://www.mcmurrayhatchery.com/ameraucanas.html
To me it's
almost more shady than the others that clearly say meant to represent the breed but not for show.
Ask any breeder or passionate (semi- educated/experienced) poultry person.. like myself. (as well as most long term BYCer's). and we will say EE and never ever refer to them as true Ameraucana. Also the American Poultry Association would NOT recognize them as Ameraucana and they would be DQ'ed from show for feather pattern alone. This is not my assessment or thought when discussing project colors that folks hope to have admitted to the APA some day.
The hen seen in their pic when you open the link above is very typical of chipmunk stripe chicks.
As previously stated though.. I do love EE and think they're a fantastic almost required addition to any flock.
The closest accepted Ameraucana chick color that would produce chipmunk striped chicks and only one I know of (currently) is Silver.. I *believe* it's called partridge in some breeds (Welsummer) and maybe like brown in Leghorn. (IIRC)
Here is a link that describes some of the differences seen..
https://the-chicken-chick.com/ameraucana-easter-egger-or-araucana/
Many hatcheries are carrying true Ameraucana in several varieties these days (if it becomes important to you).. most commonly black/blue/splash and Lavender. One even has Wheaten Olive Eggers.. so maybe they're also offering wheaten Ameraucana.
Just for conversation and information's sake.. the black copper of Marans is known as brown red in Ameraucana. It can be confusing (for me) trying to keep them all straight but it's fun to practice.
I was trying to debate which color I was seeing on my screen regarding your Wyandotte.. should be gorgeous!
While many folks say they only and purposely send roosters as the extra.. I have always gotten extras in line with what I ordered.. iow, female orders got another pullet added. Hopefully yours is to, and I think it should be!
Wyandottes are slow feathering and not feather sex-able referencing your first post, see following link for easy to follow explanation..
https://www.cacklehatchery.com/what-is-feather-sexing-separating-fact-from-myth/
Note, although I asked about comb type and Wyandotte should have rose combs.. because of how genetics works (straight comb being recessive), some hatchery Wyandottes are sporting straight combs these days (& can hatch from visibly rose combed parents). I used to think they were keeping starlight combs on purpose due to reported alleged reduced fertility (sperm motility) after several generations of breeding rose combs.. but the whole dominant recessive comb trait thing makes a ton more sense after some breeding adventures and very basic genetic stuff. I am very novice relative to what there is still to know and make mistakes too often so please always verify.