White leghorns, boys or girls? Please help.

[Amylia]

36 days ago I purchased four leghorn pullets and two straight runs that weren't supposed to be leghorns. I think the two straight runs are boys and are leghorns. Any input is appreciated. The first few images are of the straight runs. Then, there are images with the straight runs next to the leghorn pullets. I'm guessing they are about six weeks old. Age input would also be great! Thanks!

 

[Amylia]

 

[Wyandottes7]

Your Leghorns look like pullets, while your straight run birds look like cockerels (their breed is probably White Plymouth Rock).

 

[BantamLover21]

Your Leghorns look like pullets, while your straight run birds look like cockerels (their breed is probably White Plymouth Rock).

Agreed

 

[Amylia]

Thank you! What characteristics show that they may be Plymouth rocks? I'm trying to learn...