Mystery grey chicks turned fluffy white with green legs

[Bluekoolaide]

I got an order of “choice egg layers” and “assorted heavies” from mcmurray hatchery in early June. In there were some grey chicks with green legs. Now at around ten weeks old they’ve turned white and have almost silky butt feathers and still green legs. I’ve no idea what they are… any ideas? I’ve had amberlinks suggested but they don’t have grey chicks. I’ve also heard leghorn but I have others I think are leghorns and they don’t seem similar enough. Any ideas? I’m after the white one on the right where there’s more than one.

 

[Rhodebar Lover]

She's a White Jersey Giant

 

[LadiesAndJane]

Green legged one is likely one of their "colored egg layer" hybrids.

 

[Bluekoolaide]

She's a White Jersey Giant

I hadn’t thought about that at all, you might be right!