4 week old bantam chochin Chicks - help with sexing please

[Lilbrownie]

pretty far from PA actually.  SE QLD, Australia

Boo, nice to hear he is so friendly. Love love love this breed!!

 

[steenie]

Please take a look at these Bantam Chochin Chicks and let me know your sexing thoughts.

I looked at the chicks when they were very young and both of these two grew out their flight feathers very quickly, and according to the observations on this link they should be Pullets, however they now have pink combs, so I am confused http://forum.beemaster.com/index.php?topic=26745.0

Thanks for your help

Wow these are 4 weeks old? I have a mystery bantam I think is a pekin (which I thought was synonymous to bantam cochin...?) and she is TINY in comparison....