Oh my goodness, this is so strange and sad to read because yesterday my chicken Agnes was found yesterday too, she never went off on her own usually but we found a pile of feathers, then blood, more feathers, and eventually found her body further in the garden amongst the reeds. I'm not 100% sure what got her, but I reckon it was a goanna. Her head and one leg and innards were all gone. I think a dog would have taken her whole body, and we don't get hawks around here. Sorry you lost your Agnes too, it's so sad to lose a chicken this way