What breeds are these? 3 month olds lots of pictures

[Cason]

I think all those Americanas/Arcaunas have green legs.

 

[reveriereptile]

When I was outside I noticed the #2 (have a male and female) are both smaller than #9. I do have two smaller white ones that have the blue feathered legs like the bigger one that are the same size as the black ones. I'll try to get some more pictures of them. Maybe a group picture with the black and white ones together might help. The black one in picture #2 is the female.

 

[reveriereptile]

What gender are the birds in pictures 4 and 5? I'm trying to figure them out to know which ones to get rid of. I'm assuming they are males but just want to be sure.