We have 3 eight week old Black Australorps. one has a Very developed wattles and combs, one has almost none, and the other is in between. From my untrained eye i would assume the very developed is a male, while the one with little development would be a female. But can anyone help me figure out what sex the middle one is? We CANNOT have roosters in my city and would like to give myself as much time as possible to find a good home for it if it is a male, but don't want to give away a female. It does seem that the male and the unknown do have some standoffs where they seem to be sizing each other up with the necks stretched out.
Male and the unknown

Close up of the unknown

Assumed female

Thank you for your help!!!!!
Male and the unknown
Close up of the unknown
Assumed female
Thank you for your help!!!!!