Dutch gender?

[chickjhf]

So, I got this Light Brown Dutch chick, and now at 3 months old it looks just like the dutch hen that I have. (Just a smidge smaller, but otherwise the spittin' image).

At what age will it start to look different if it's a rooster?

 

[cthrash1]

Can you post a pic? I'm thinking it should be showing signs by now at this age, and it should start crowing if it is a male.