How can you tell the gender?
Especially at such a young age.
I agree with you on the second one being a male. But I think the third one is also a male. I did my research (sadly I didn’t understand any of it) but from what I gathered, pullets have fuller feathers and cockerels have like undefined feathers.Ok. I had thought they were younger. I think the second one is also a boy. The one that looks most like a pullet is no. 1
And I agree they might be leghorns.
How can you tell it’s a male?
I looked at the comb color and size. Cockerels have combs that get more pink, and then red, at an age when pullets have pale combs. Cockerel combs usually get larger, too.
In this case, I notice the comb on the 4th one being more large and pink than what I noticed on the others.
It's common for one cockerel to develop faster than other cockerels, and for all cockerels to develop faster than all pullets.