Cockerels will start to jump and play fight at about 4 weeks old, sometimes before that. The males are much more aggressive than the pullets. They run and jump for no apparent reason, they also bully the others by pushing and shoving.
All of my roosters start crowing around 5-6 months old.
Roosters will usually make their first attempt at crowing between 5 and 8 weeks old. At that time the males in the flock will also start...