Wry neck is sometimes caused by a head injury or a peck to the head. It is common in the Silkie breed to the extent that is is often referred to as "silkie syndrome." Silkies tend to have high domes and at times the skull doesn't completely harden over.
Try searching for "wry neck." Sometimes it responds to polyvisol pediatric vitamin drops (NO IRON forumula) & a few drops of vit.E ( from a pierced capsule) daily. If a vet feels it warranted he may use cortisone in treatment.
You can also try gentle massage- aimed at positioning the neck correctly. I'm a bit rusty with this. In my early years on BYC, it seemed that wry neck was extremely common. But, I haven't seen it mentioned in quite awhile.