What gender and cross are these chicks?

[dana79]

I was told these five chicks were cochin bantams. Could you tell me what gender they are, what they might be crossed with and why the black one is developing gold feathers around the neck?

 

[Happy Chooks]

Do any of them have 5 toes? A couple of them look to be silkie crosses. Pure cochins do not have crests.

 

[donrae]

I'm also thinking cochin/silkie cross on some of them. The little splash bird with the red face looks to be a roo, not sure if those are all the same bird. I don't see any obvious roos otherwise. The black with gold bird is just showing gold leakage from mixed color breeding, it will probably get more gold as it ages.