At what age should I be able to start sexing my WCB Polish BANTAMS?

[Kelly G]

I have 7 WCB Polish Bantams. They turned 5 weeks old today. I see a lot of chest-butting - but they all look alike to me!!

When should it start to become clear???

Here are a picture of 2 of them that held still enough tonight that I could take a picture:

Any help is appreciated!

 

[solarquail]

imma guess those to are pullets they have a round crest i could be wrong but its what ive exsperienced

 

[Chosen Chickens]

they look like my two that are that same age that I am hoping are pullets as well.... does anyone have a pic of a roo at that age? Are they any differnet

 

[Kelly G]

I hope they are pullets...but I know SOME of the 7 are going to be roos!

How about this question - at what age might they start crowing?