I have had 6 birds for over a year, I live in a residential area, with a picket fenced yard with chicken wire around perimiter. In the day the chickens walk around the yard free and live their life. Today I look outside to a pile of white feathers and my bird laying there. I run out there hes warm and alive but doesnt move. He has blood from under his wing coming out. And even blood in his eyes I laid him on a towel in a nest. Hes breathing but doesnt make noise. I though about ending it for him but not sure if he will pull through as I can't diagnose the extent of the injuries internally. However, I have 5 other chickens, One is laying an egg in the garage and alive and well. The other 4 are completely missing. No feathers , no evidence. Gone. I have looked everywhere including driving around the neiborhood and talking with other residents. No sign of 4 chickens. Is it possible a bird could of taken them with no evidence? Just kept coming back and grabbing? With leaving not one feather of struggle? The birds have never flew over the fence but with adrenaline I am sure they could. But I am just distrought and don't know what to think.