Sounds like a weasel to me. I lost 2 RIRs to one before my Dad and I stayed up the third night and waited for whatever it was. We caught the weasel pulling one of our hens put of the house. Still alive. My dad shot the weasel by flashlight without hitting the Hen, miracle of miracles. Her name was quite apt, Lucky. We had saved from being a meat bird for one of our neighbors, hence we had named her Lucky.
Your birds look just like mine did. Mine were also drug with no heads.
Your birds look just like mine did. Mine were also drug with no heads.