When does "cheep cheep" become "bok bok"?

[Stacykins]

Some pullets I hatched are ten weeks old today! But they still make chirping noises like chicks as opposed to the sounds adult birds make. When do their vocalizations tend to change?

 

[msviolaceous]

Mine are around the same age and some still cheep, so I think that's normal. However, if I may piggyback, some of my chickens have a raspy vocalization that sounds like a cross between a cheep, a bok, and a train whistle. Is this normal or need I worry about them having irritated tracheas for some reason?

 

[ReikiStar]

I have a hen who has been on the fast track to development since she was 6 weeks old (BCMXBarnevelder) and she started going "bok, bok" about a week+ ago. She's 16 weeks. We expect her to be the first to lay eggs. The others are in between, a little more on the "chirp, chirp" side but you can hear their voices changing (thinking Peter Brady). It's interesting to see the transition.

 

[centrarchid]

The voice change from cheep cheep to bok bok about time of sexual maturity.

 

[sherylreno]

Mine are now 3 months old and their cheeps went away about 2 weeks ago.