Need help sexing my BR & EE chicks (Pic Heavy)

[Rodeoclown1189]

i think #2 is a cuckoo marans roo because they have white shanks and beaks and they dont have to have feathers on their shanks either

 

[Jferlisi]

1, 2 and 3 are cockerels. The blue EE is a pullet. She is very lovely looking.