What breed is this and roo or hen??

[Corralejo24]

Ok will do. Here is a couple pics up closer. Fast little birds lol. #1

#2

#3

 

[Corralejo24]

Can some one please help me I have a black australorp that is around 9-10 weeks and jus in the last week has changed dramatically. I beleive its a cockerel ?

[/IMG][/IMG]

 

[redsoxs]

I think hen...but I'm only right half the time!!

 

[Corralejo24]

that's what I'm hoping for. I have 2 of them and this one just looks a little different to me. It does bump chest with others. But I guess female birds do that to I have some barred Plymouth that has done it.
Thank you for ur help.