Chicken acting up - sounds of pain?

[Sparko]

One of my chickens look like she’s in pain sometimes, this is the third time I saw it happen but it might’ve happened when I wasn’t there as well. She would stay still, put her head down, and start making this sound like she’s in pain while kinda moving her head around.

Here’s a short clip of her doing it, I only managed to capture when it was about to end.

What could this be?

 

[CluckerCarrolls]

Is she displaying any other symptoms? Has she been laying?

 

[Sparko]

Is she displaying any other symptoms? Has she been laying?

Nope and no, I don’t think she’s old enough to start laying (4 months)

 

[Sparko]

Nope and no, I don’t think she’s old enough to start laying (4 months)

Actually, the three silkies I have tend to breathe through their mouth a lot. Hmm do you think it might be gape worms?