A silent crow???

[mamdoe]

One of my 4 week old chicks has been lifting its head and opening its mouth as if to crow but nothing comes out.
It only does it every once in a while and it just started happening today.
Is this a first attempt at crowing or signs of an illness?

 

[Gonzo]

Its something alot of chicks do. I had one that we thought was practicing crowing... turned out to be a hen!

Its normal, noting to worry about!

 

[mrbstephens]

They're moving food from their crop downward.