We free range our chickens and have never had a problem until recently. We moved our chickens, turkeys and ducks to our future homesite. We do not live there, but visit every morning and evening to let our birds in and out. They have lived there for 4 months safely until this past week. They free range during the day and are locked up at night. I count them daily and nightly. All murders have taken place during the daytime hours. #1- Hen disappeared. We found her body three days later. It's 6 acres and a big area to search. Her feathers were plucked off her head, neck and 1 breast. Nothing else was touched. Birds were completely free ranging. #2- We went to put birds away before dusk. Turkeys and ducks were huddled together under tree. Chickens were scattered. Rooster saw us and called hens in. They came running into coop from under bushes. Everyone returned except one of our old girls. We still have not seen her body. #3- Went to lock up birds tonight and 1 girl was missing. No sign of her. Since our second girl disappeared, we have been keeping them in their electrified poultry netting fence. The missing hen occasionally jumps fence. As do 3 others. I am at a loss as to what to do because I don't know what kind of predator I'm dealing with. I don't want to clip their wings if it's an aerial predator and make it harder for them to get away. I want them to be able to forage but also want them safe. Any idea what could be killing our chickens? We also have turkeys and Indian runner ducks and none of them have been killed.