Springchicken -
Sex of those birds, please? I've got 3 Australorps - one I'm pretty sure is a roo - pink comb bigger than the others at 4 weeks and change. Actually "his" comb is similar to your birds. I new to this and have nothing to compare him to other than the other birds we got - a couple of barred rocks and EEs.
I have a pile of 5-6 week old black aussies. They are the ugliest chickens that I have ever seen. Although they are beautiful when they grow up. I had a lady that wanted a few but when she saw them she changed her mind until I showed her adult birds.
They are so mild tempered and loving chickens. Wonderful breed. I just sexed mine tonight.
I had never heard of them until I bought a few and now everyone that sees my birds wants chicks.
Mine will be 5 weeks in the next couple days. My wife went down stairs to look at them the other days and says to me "Ugh, why did you choose this breed again?"
Evidently, she thought they were ugly too. After I explained to her that they are supposed to be proficient brown egg layers that are winter hardy, curious, and not flighty she seemed to calm down a touch.
To of my Australorps have a single white tail feather though, I wondered what that was all about but I'm figuring it's something that will change as they age.