Mystery chicks!

[RDchicken99]

Hiya! I was looking at a chicken book and I saw a pic of some cute chicks! I have these EXACT chicks!! I need to know what breed these are as I got my chicks from a mystery egg batch! They are featherlegged, by the way. Thank you!!

 

[FoodFreedomNow]

Based solely on what I can see in that photo, I'd guess possible Black and Blue Copper Marans. How old are your chicks?