9yrs.. I have a Long time to catch up lol I got chickens July 2023, and was forced to learn extremely fast cos one of the girls sounded like it had a flat battery up it's butt, then started growing.. Big..
Then one of the hens got sick, hence my super fast studying everything I could cram in about chickens. She got better and was well for almost 6 months. But my carer although she tries, had no clue about chickens in the heat, so one died after I got home from a market.
So when Rhodey got old enough to mate, he chose one as His girl... She, who has been ill since May and not currently laying or running with him, is the tiny Hy-line mumma if all my chicks.
She's thrown leghorns, pure black chicks, the very first surviving chick which when hatched I did a fast study on how to sex them, was a boy. His comb made it easy to tell.
Try this:
On day of hatch, (most) girls have very little or no comb showing but look like they're frowning, plus they waddle more rounded. When you spread their tiny wings there is generally long/short feathers. If they're just fluffy with no formation, it's a boy. Check the forehead as well, if no comb has formed, there will be a longer line in the brow.
By 1-2 wks old, the girls tails are usually already started, or beginning to spike. Their bodies feel rounder and they waddle in a squatting posture whereas the boys stretch more an have no tail feathers