I free-range my "Girls" in my fenced -in backyard, the fencing has slots that allow smaller animals in and out. Yesterday I returned home to find feather patches throughout parts of the backyard; large patch from my cuckoo marans, a small patch of RI red feathers, identifiable feathers of other hens. I started the day with 6 layers and 2 x 13 week old pullets, only 3 came home to roost. 1 of the 3 has loss of feathers on the back, and clearly hurt. I have no carcasses, no blood. Something or things carried the hens away. I envision and squadron of hawks with what I found on the back of the Red. The lack of blood and carcasses makes it hard to make a case for a ground predator. Any thoughts and what advice on what I should do would be greatly appreciated. And when to begin to repopulate. Naturally the outdoor time for the Girls will be severely restricted and only happen when to dog can be out with them. I am so very sad also, these Girls have been part of the family. Thanks for any help.