Most of the smaller mammalian predators will have to wrestle chicken dislodging feathers over a larger area. An owl like a Great-horned Owl will typically grab chicken by neck leveraging it down quickly for a kill by what I think is cervical dislocation. Owl bites appear in proper location for that.
My last post had a link to "what killed my chicken", and requires permission to post. Im not sure if it will show later or not.
It was likely, racoon, weasle or mink...