What gender on 5 month old Marans mix

[MarshaB]

I have 3 Marans mixes that were hatched beginning of March. A month ago one began showing definite signs of being a rooster. He is in the background of one of the shots. The other 2 are about the same size and have some characteristics of male. I'm pretty sure #1 is, but I'm still not sure on #2. We will not keep them if they're roos, and would like to re-home them all at the same time. Thanks for your input.

 

[rural mouse]

Both roos.

 

[The Moonshiner]

Cockerels