3 Month Old Black Copper Marans - Help with Sex!

[JennyPatty84]

I have 3 x 3 month old Black Copper Marans and I am hoping you can help me sex them - I am terrible at this. I usually find out when they crow! I am also new to owning Marans so I have absolutely no idea! I did noticed the two of them have black ears and one has red/brown ears so I don't know if that's an indicator of anything? Their three combs all look a little different too for some reason, so that's not helping! Here are some pictures of the three!:

 

[oldhenlikesdogs]

Those are all roosters. I believe only the roosters get that degree of copper.

 

[kitkat5505]

Yep all cockerels.

 

[JennyPatty84]

Darn!!!! I have the worst luck! My Ameracauna's were all boys too!

 

[Ol Grey Mare]

cockerels..... cockerels everywhere

 

[drumstick diva]

Beautiful cockerels though