weird yawning..?

[Chick - n - Rachel]

My five girls are seven weeks old and seem very healthy, but theve started doing something that looks like there maybe yawning, or opening their beaks and stretching there mouths...?? Is this normal behaviour?
Have any of you seen your birds doing this? Sorry if this is a normal thing, but Im a new chicken mom and I just want to make sure Im not ignooring something important, Thanks.

 

[debilorrah]

Quote:
Search for gape mouth, or something similar. My brain just popped that one out! I read it here somewhere....

 

[Year of the Rooster]

I see mine do it every once in a while. I've heard it has something to do with a full crop? I'm not sure. As long as it's not happening at a constant rate or non-stop, then I wouldn't be worried. By that I mean yawning every second.