Help why is my roster doin this?

[KNM8808]

Please can anyone help me figure out why my roster just started doin this? He’s jerking his neck to the side and has been doin it for a few days now. He’s acting normal eating pooping and everything just will start jerking his neck over to his right side. He’s a Paint Silkie and is still young just started crowing

 

[Mtnboomer]

Parasites?
Onset of mareks or other neurological issue?
Just spitballing