Bantam Cochin Roo or Hen?

[HippieHens]

[VIDEO][/VIDEO]Hi all! I am 5 weeks in to my chicken adventure and my sister gave me some chicks to add To the flock. Now I have 5! Anyway, the three pictured in the link below are much smaller than my other chicks but the same age. I think they are bantam chochins but I am not an expert. What do you think? Also, do u think the black chick is a Roo? I hope not!!!! She/he is so funny and observant. His/her feet have a lot more feathers than the other two little ones and it's comb is much darker and more pronounced. Thanks!!!!

http://instagr.am/p/LX3OW8lTpG/

 

[ramirezframing]

roo but I only see the blue one

 

[BlueCamas]

The one in the pic is definitely a cockerel.