Rooster shakes his head

[BigBlueHen53]

 

[MaeM]

No lice or mites?

Can you get a video of him?

https://imgur.com/osMNLWv

It lost quality when I uploaded it but I hope it helps.
I mean, it's a common movement, the thing with this rooster is that he does it often and I've even seen him scratch his ear afterward.