I'm new here. last week I had 3 chickens killed. Not sure by what though. One was about 30 ft. from coop in the driveway. Had some blood around her neck area. 1 was 15 ft. from coop in the yard. not a scratch and another 40 ft from coop , some feathers gone. Anyone know what typically does this. It happened between 7-8:30 am. I think it was a dog. We put out live traps and have caught nothing.