The black hens look like they have gold on their heads and necks... they could be black sex links, and then the brown would be your EE that gives you the green.
The other posters could be correct. You will know when they start to lay their eggs. I had bought some chicks that were supposed to be Brown Leghorns but turned out to be Partridge Rocks. As chicks they looked similar. I suspected but was assured when they started laying brown eggs and not white eggs.
Are you thinking about purchasing them? I would ask for clear, close up, individual photos to make sure it is actually a molt and not some kind of pest/parasite. It would help identify breed too!