The chick looks like it is leaning towards cockerel for sure but I would still wait. Sometimes they will fool you.Yes I also have a second australorp, same age, that wasn't in the previous picture. Do you think "Dolly" could possibly be a female? Here are some pictures for comparison.
Picture #1, "Minnie" is the one I feel confident is a female. She has feathered out similarly as the Easter Eggers. She has a tiny tan comb that they don't have, but it's much smaller than "Dolly."
Picture #2, "Dolly" is the one that looks to me like a cockerel. Mostly because of the comb and lack of tail feathers.
I will admit, I am very inexperienced in sexing chickens. Virtually no experience, actually, so I would really appreciate some more experienced people weighing in. Also, Minnie was the smallest chick in a bin of about 40 Australorp chicks.
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If they were sold as pullets, then they were vent sexed at the hatchery. That is more than 95% accurate but that 5% will still pop up sometimes