Pullets or cockrel

[Laura lim]

Pretty sure your oldest Brahma is a cockerel. I'm seeing a darker shade of buff starting to come in on the wing/shoulder.
Won't be able to sex your Ameraucana till they are about 8 to 10 weeks. They tend to be a slower to develop breed.

That Brahma is going to be interesting cause it's a Brahma roo fravolles hen cross. Trying for bearded Brahma lol.