Help with two pullets/cockerels?

[niftyblue]

Hello everyone! I have two chicks in my flock that I’m thinking are cockerels! I’ve noticed they are also the only ones in the flock that chest bump and feathers around neck stand up. One, I think, is a barred rock. The other a standard Cochin. They are 7 weeks old. I need help identifying them as pullets or cockerels. I can’t have cocks in my backyard. Also, do I have the “breed” correct for both of them? Thank you!

 

[SBFChickenGirl]

The black one is a black jersey giant. The other one is a buff/red cochin. (Not sure about the coloring)

Both appear to be cockerels.

 

[niftyblue]

Thank you so much. I had a gut feeling they were cockerels.