Why is my chicken doing this crowing movement?

[alyaofnight]

She looks like shes yawning...3 weeks old or maybe it's a he and he is fake crowing? Just curious as to why it's doing it.

 

[chickengr]

maybe some feed got stuck in his/her throat? my hens sometimes do that when eat layer's mash.

 

[BuckeyeAmy69]

Adjusting her crop. Chickens do yawn, but it's very quick and subtle and not repeated like this. I wouldn't worry.