Look at them. Do you see pretty hen or tough roosters? I see roosters in the flock.
1st one on the left- look at the thick legs and feet. Look at the way it stands, head up and alert. The other one in the middle head down pecking looks like a cockeral to me too. The dark one just behind them - Cockeral.
Mark them, Steve. See if I am right or wrong.
It is far easier to predict the cockerals than to 'see' the pullets.