Sex of these 11 and 12 weeks chicks

[Cockatoomama]

Hello everyone. I got these chicks at about 9 weeks old. White ones are leghorn cross RIR, the red one is same but reverse and the black ones are said to be frizzles. I know the white one in the back is a roo and I'm hoping the other two large ones are bullets, and the frizzles....well I think one is at least.. please help with your experience. Thank you

 

[Cockatoomama]

Oh they're now 11 and 12 weeks old

 

[fluffycrow]

The white bird in the background, and the black frizzle in the foreground, the one closer to the camera are cockerels

 

[Flockking]

X2

 

[Folly's place]

Welcome! I agree, two cockerels. And remember you can't breed frizzle to frizzle, must outcross.
Mary

 

[NatJ]

And remember you can't breed frizzle to frizzle, must outcross.

Explanation for anyone who does not already know:

Frizzles are certainly capable of mating with each other, and incubating the fertile eggs will produce chicks.

But when two frizzle parents produce chicks, 1/4 of the chicks have health problems (feather issues and other problems too.) Those over-frizzled chicks are sometimes called frazzles.

But crossing a frizzle to a normal-feathered chicken should work fine: half of chicks will be frizzles, and half will have normal feathers, and none will be frazzles with problems.

 

[Folly's place]

Yes, I should have explained...
Mary