Help sexing a chick

[Iheartchickens7]

Just wondering if anyone could tell me what little baby is. Got them 5 weeks ago. Bantam cochins. 2 of the 4 I have I am fairly certain are cockerels. This bird has a small comb compared to the others, but it is looking more and more pink to me. I do not know if they begin to turn pink at this age in pullets. I have a buff that I am pretty sure is a pullet and she has no pink color whatsoever in hers even though their combs are the same size.

Thank you for your help!

 

[nurse_turtle]

I wouldn't rule out a pullet just yet. I don't see any wattles on that little one.

 

[chickenmaniac]

roos and more roos lol

 

[Iheartchickens7]

Thanks for the responses! Anyone want to give a tie breaking opinion?
Here is another picture just for the heck of it.

 

[Pele]

Hrm, I agree they are all most likely roos. I have noticed that male Cochins have a habit of growing combs early. In the last picture, is that a random patch of isolated red I see on the wing? That would be a definite case-settler on the side of roo.