mortie, I am 100% in agreement with MC! Welcome! and stick around!! we'll wait the whole thing out with you, from hatch to POL (point of lay)!
how exciting to have mystery eggs! that's something I would do... I hope you get a Barred Rock or 2... but you might get anything! hope you are ready to use that camera a lot so we can watch them grow up and solve the mystery! as for future eggs... if they do hatch out to be Ameraucana, they are late bloomers, and not known for being "great" layers, but they're pretty good... if, as is more common... they are Easter Eggers... you will be super stoked! they're better layers than Ameraucana's, friendlier, hardier and frankly prettier because they are more varied in color and pattern. good shot at having all blue egg layers, or green depending on what the sire is...not likely to get pink or cream... but your mystery chicks might lay a lighter egg than they hatch from.... are you allowed to keep roosters? would you keep roosters?
how exciting to have mystery eggs! that's something I would do... I hope you get a Barred Rock or 2... but you might get anything! hope you are ready to use that camera a lot so we can watch them grow up and solve the mystery! as for future eggs... if they do hatch out to be Ameraucana, they are late bloomers, and not known for being "great" layers, but they're pretty good... if, as is more common... they are Easter Eggers... you will be super stoked! they're better layers than Ameraucana's, friendlier, hardier and frankly prettier because they are more varied in color and pattern. good shot at having all blue egg layers, or green depending on what the sire is...not likely to get pink or cream... but your mystery chicks might lay a lighter egg than they hatch from.... are you allowed to keep roosters? would you keep roosters?