When do roosters start to crow?

[cook_kaka_ook]

My cockerels are 13 weeks old (1BR,1RIR 1Americauna,1brahma & 1SLW). Will they start crowing soon? If so which of the breeds will start first.

 

[Tam'ra of Rainbow Vortex]

My SLW was the first in my flock to crow. He was always ahead of the others when it came to making noises, though. He squawked and clucked first, so I was not surprized when he figured out crowing more than a week before the other 14 boys. He had his crow perfected before my silver penciled wyandotte even tried to crow.