I have a one year old Tom. He lives in the barn. I let my chickens free range in the day and lock them in a stall at night. Yesterday I went to the barn to check waterers and Tom was standing over a hen that was flopping all over the floor. I shoo'd him back, picked her up, looked for something wrong and laid her back down. I went to holler at my hubby and when I came back she was dead. I found no trauma to her except her vent seemed swollen and open. I don't think it was prolapsed, but I'm not sure. What happens when a turkey tries to mate a chicken? I've heard it kills them but does it kill them w/o leaving tread marks or what? She had no cuts, wounds or blood anywhere.