How do you sex chicks?

[vortec]

I am at the time unable to put pics of my chicks up here, but I will asap.

In the meantime, are there any ways to tell what gender a chick is? My barred rocks are about 3 weeks give or take, and my australorps, buff orps, black giants, rhode island reds are two weeks. Is that too early. There is one australorp that is nearly twice the size in height of the other two so I'm thinking probably, one roo two hens??? I know this is tough without pics but is there anything that I can look for to tell? Thanks in advance

vortec

 

[speckledhen]

You can sex Barred Rocks at hatch. The males will be more silvery/grayish black due to wider white bars. This link is about Dominiques, but does apply to BRs as well.

http://www.dominiquechicken.com/Sexing_Dominique_chicks.html

The others you usually wait till the comb turns and other secondary characteristics show up. BRs are much easier.