i think you can see the comb's pretty well if you cant it's cause they dont really have one yet (its hard to take pictures of them especially their faces lol)
ik they are a little young i think around three weeks.
the yellow one, 'borp' is supposed to be a hen
the light gray cochin 'abraham' is supposed to be a rooster
the black and white 'jane' is supposed to be a hen
the dark grey one 'greta' is supposed to be a hen