These are definitely mixed breed- I do know there was an Ameraucana roo and a Cream Legbar roo and an assortment of hen breeds. (bought as fertile eggs for 1st time broody) One of these two hatched from a white egg which is from a white faced black spanish hen. The dark grey in particular has some kind of barring that reminds me of some of the CL crosses I've seen on various threads- as does the light grey, but not quite as pronounced. Also would love gender guesses.
All pictures are at 4 weeks of age:
Dark Grey:




Light Grey:




All pictures are at 4 weeks of age:
Dark Grey:
Light Grey: