Okay BYC, maybe you guys can help me out. My husband and I had around 40 hens and some roosters, about a month ago we went to the barn to let them out to free range (which we ALWAYS do) after we let them out we left and returned about an hour later to check on them, we try to check on them regularly while they forage during the day. As soon as we pulled into the farm drive we knew something was up, feathers were EVERYWHERE. We lost about 10-13 hens and are alpha rooster. After this incident we had nightly and early morning watches to try and kill whatever was harming our birds, we found nothing, no tracks or fur, nothing. After keeping the hens up for a week, I felt safe again and let them out and everything continued as normal. Well last week we moved our eight new pullets in with our large flock, we kept them in the pen for a few days as we usually do with new birds and then let them all out again. Everything went well until yesterday, we had been gone over the weekend to the lake and had a dear friend help us with the hens, he also raises chickens so he was the only guy I trust with my girls, Anyway when we returned Sunday afternoon all but one of our new pullets were dead. We're getting really discouraged since in our years doing this we've never had this happen. We have live traps set up currently and the girls are not allowed out till we catch whatever is harming them, we just cant afford to loose anymore. Please if you have any tips on catching whatever it is please leave a comment or message me, we are in great need here. Thanks everyone! PS: If this helps identify what killed the birds this is what we found: The dead birds we did find were only half eaten, some had their heads removed and others did not. All that was left behind mostly were just feathers, there wasn't even that much blood splatter.