Gender Help please

[ChickenerMan]

Hi guys i have some crossbred pics but unsure for what to look for?
Chick1~sorry about the red on some of the pics as i was covering the flash so the light wouldnt scare him/her~i think it's a aracana cross













Chick2~blurry pic sorry :/~New Hampshire

















Chick3~Orpington cross on pic directly above





chick4~blue
Orpington


Thanks

 

[Wyandottes7]

They all look like pullets to me. Do you know how old they are?

 

[ChickenerMan]

Hatched Feb the aracana is quite large and has huge tail feathers and the new hampshire is as big as my other hens. All the chicks have big scraps between each other but is that just sorting out the peaking order or is it roo fights?
I tried to sex the orpingtons at 2-3 day olds from this link:

and they seemed to be roosters but now they are the lest likely to be rooster in the group.