Your second Aussie is 
if you even hinted you believed that.
I got 2 BAs from Ideal in 2012 and 2 more from Meyer in 2015. All were pullets so the suggestion that they can't be sexed is wrong. Got 2 Barnevelders from Meyer in 2017, 1 turned out to be a cockerel. Side by side comparison helped I'm sure but I was 110% sure he was male at 3 weeks. Had to wait until he was 11 weeks to claim my refund. But they were quick to do so when I sent a picture of the 2 birds together at 11 weeks.
Here they are at 4 weeks. Guess which one is the cockerel.
This is them sunbathing at 6 weeks
Here is the 11 week picture


Though you still have to figure out what to do with the unwanted cockerel.If you order from Meyer, they will refund you for male chicks you receive.
I got 2 BAs from Ideal in 2012 and 2 more from Meyer in 2015. All were pullets so the suggestion that they can't be sexed is wrong. Got 2 Barnevelders from Meyer in 2017, 1 turned out to be a cockerel. Side by side comparison helped I'm sure but I was 110% sure he was male at 3 weeks. Had to wait until he was 11 weeks to claim my refund. But they were quick to do so when I sent a picture of the 2 birds together at 11 weeks.
Here they are at 4 weeks. Guess which one is the cockerel.


This is them sunbathing at 6 weeks

Here is the 11 week picture
