From about age 2 months up, I played a recording of a rooster crowing. We originally had two roosters (by accident), and the first one crowed at 3 months on the dot, and the younger one at about 2 1/2 months. (We were told the younger one, which we hatched, was a girl. Nope. So we gave the other one back and got some girls.) Now the one we hatched is noisier than anything. Well, he's been noisy since he hatched. But we used to be able to pick him up to quiet him down. He used to want to be held all the time. Now he doesn't want to be touched. Guess he's just too grown up to have mommy hold him. lol