Chicken killed by????

[gsim]

Daytime kill leaving the head intact. It is likely a hawk from your description of remains.

Hawk will kill and eat something they might be challenged to carry off if they feel safe doing so.)

 

[CMV]

Hawk. They tend to eat the neck and breast area first. Sorry for your loss. The hawk will be back. They return to an area after they have had a successful kill, and hang around looking for more.