This just happened. I went too the store, and had let my chickens out into the backyard. I came home and saw piles of feathers, and bolted out of my car before even shutting it off and dropped my purse. ( if you have raised chicks from tiny babies you know the horrible feeling of losing one). My Boston terrier had attacked my hens. I quickly gathered up the survivors and put them back in their pen. I then gathered up two dead hens (stiff defianatly dead) and one hen that had her neck twisted and was twitching which broke my heart. I determined the one with the twisted neck wouldn't make it she was seizing and couldn't stand or lift her head so I euthanized her. I ran in called my husband than my mom bawling. I know it happens, but these hens were so tame they sit in my lap and come running when I call them. When I walked outside too bury them one americauna the one that was stiff and cold was sitting up. Her I could explain as maybe shock, but the one I twisted her neck, and not too be graphic but it crackled and I couldn't get the feel off my hand of it and nearly upchucked was sitting up too and clucking. They looked awful but were alive. I can't explain it I don't know how they were alive, but as I type this I have them in a box in my office. I really hope they make it after all that.