Bantam Barred Rock - what should I look for regarding sexing?

[Feklhr]

So, we're brand new at this and have 6 baby bantam barred rocks. They are a couple of weeks old and looking forward to finding out if they are guys or gals. What physical features will we begin to see to help us sex them? We've seen a couple of them "sparring" and one brought straw into the coop when I'd swept it out. What do the experts say?

 

[Judy]

https://www.backyardchickens.com/t/273471/plymouth-rock-thread/2700_20#post_9058530

 

[Feklhr]

We got some barred rock bantams from Bay Area Feed in Livermore. They're about 7 1/2 weeks old. We were guessing that only one is a pullet based on their coloring. Today the one with the brightest red on his face jumped a full grown hen and, um, attempted to, um, well, you get the idea. They haven't started crowing, but I'd like to find a nice place for them before that occurs.