My current batch of mixed flock chicks i'm raising have black feet with one flesh colored full toe and all kinds of crazy mixtures, so you never know lol
So attached is a sapphire gem chicken I found because I wasn't familiar with this chicken. Not being familiar with the chicken I have no idea. But I'd love for you to keep us posted.
First of all do we know if these are pure bred chickens? 2nd, white Jersey Giant is a great guess, Jersey Giants have black legs and feet tops, with flesh colored feet on the middle and bottom of the foot.
With that said, I just hatched 15 chickens that are a unknown mix of all my chickens...