I got 5 Australorps with my order in March. I secretly was hoping for a rooster out of my 13 chicks. Two of my Australorps have had bigger combs for weeks & I have read the stories where people didn't know they had a rooster until they were 10+ weeks old, so I still had hope. Mine will be 10 weeks tomorrow, but I see no real signs of them being a rooster, even though one has gotten small wattles already. Australorps must be tricky to sex. I usually know straight combed birds by 3-4 weeks.