Below is a picture of my 4 month old chicken, Delta. She is the first egg I've ever hatched under a broody hen that lived to adulthood. I have been calling her a girl as that is what I am hoping she is. I can't have a rooster. Delta's egg came from another local backyarder. She said she just had a mix of american breeds so eggs I picked could be any mix. I grabbed about 5. 2 hatched one died soon after. But Delta here made it.
I'm sure there isbut I heard some rooster are late bloomers for greeting the day. She is my most unfriendly chicken but the only one that wasn't a show hen or grew up in my bedroom. So no surprise no matter the gender.