I have 2 Black Australorp pullets, 1 Black Australrop mixed pullet, and 1 Black Australorp I think is a late blooming cockerel. The pullets are 11 weeks, and he is 10 weeks. He actually has less comb than the girls and it's still pale, but he's built like the two cockerels I re-homed. I have a home for him if he is a him, but we aren't in any rush. I just want to make sure I'm not imagining things and waiting for nothing. He's on the left/front in the first two photos, and he's the one standing tall on the right on the last. He feathered slowly, his legs still aren't fully black like the pullets, and he has a white wing feather or two like the other cockerels.
LOL It depends on the minute of the day sometimes. I got my chicks thru a store (so I'm assuming a hatchery) and was supposed to be 6 Australorp pullets. I can tell 2 are most definitely Black Jersey Giants because the bottom of their feet are yellow.
So since that mix up, I am constantly questioning, well, are they pullets or aren't they? They are only 8 weeks old. None of them are obvious so I go back and forth debating in my head and I wait. I'm not in any hurry either way and if by chance one does turn out to be a male, we will keep him. We don't have any males and I kind of wish I would have ordered one so eh.
Most likely they are all pullets but time will tell I guess. Good luck to you tho!