These aren't great photos but they are kind of hard to get pics of by myself.
Their back feathers and head feathers are just starting to come in. I just don't know what to look for with male vs female.
There are two Cochins in these pics also, if you have any idea what they are I would love to know also. The darker one already has more feathers. The Wyandottes I am sensing two are roos and two are pullets just by the size and coloring of their comb.