The little black chick with the yellow head looks like a white crested black polish to me. And I think the little grey one (maybe blue) looks like a cochin. Im not sure about the little black one with the spot on its head. Some full body shots of the chicks might help. Im no expert- but those are my guesses! I can tell you one thing though- they're ADORABLE!
Ok so all of the Black and yellow ones have bumps to some degree and wifey knows the one is the Cochin Bantam so is it gray or blue and a sex is all that is left to be determined.... well and if any will live or become freezer fare.