The one behind we just have to a wonderful home yesterday. He turned out to be a roo. Black Austrolorp and his sister was looking nothing like him. So we figured it's better to find a home before we get too attached! Makes me so happy you like our Barred Rock is a little girl. Would be devastated if we had to get rid of 2 of our 5.
I would say pullet. The roo is going to be much lighter. Almost gray with a little black, whereas the hen will be black with a little gray. Here is my 4 week old roo