I had three hens who have sadly, one by one, disappeared. They free range on our 3 acre property but always stay close to the open (in the day) coop, food and our house. They love digging in my garden beds and I love looking outside to see them having their dust baths. I did make them a 10 foot by 3 foot run but we got them at a year and a half old and they had always free ranged before that, and were quite agitated in the run. I decided to let them free range, obviously much happier, and hope for the best. But now, one at a time only a few weeks apart, they have all disappeared. The coop is locked at night and nothing has got in, always happens during the day. We do have birds of prey (lots of hawks and eagles) in our backyard and I'm assuming it's them as they've definitely moved in closer lately, but wouldn't there be at least A feather around? I have done big walks of the property each time one has gone missing and nothing is left at all. Is there any way (other than locking them up) to prevent this in the future? Fake owls, etc.?