Gridguru
Chirping
If the head of the chicken is gone, my first guess would actually be that something reached through your fencing and grabbed a chicken. The head being the only part that could be pulled through the fence. Was the body found near the fence?
If so, probably raccoons, or even a bobcat or fox if you have them in your area.
If so, probably raccoons, or even a bobcat or fox if you have them in your area.