About a month ago one of my 1 year old hens disappeared without a trace. Yesterday I was talking on the phone and heard my free ranging birds make a horrible noise. I ran to check the problem and found one of my hens dead, deep in the brush near my barn where the chickens had been turning my compost. The hen had a single bite mark in the middle of her back and appeared to have a broken neck. She had almost no blood loss. The rest of the group scattered and toward evening began showing up at their coop. The rooster has identical marks in the middle of his back, the teeth marks are about 2" apart. One of my hens is still missing, I'm hoping that she is just hiding but I guess I'm expecting the worst. I left the dead hen near the spot of the attack. At about 2am I ran out of gas and went to bed. This morning the carcass is gone (6am). I'm thinking coyote but the mid-day attack surprises me. What are the experts thoughts?