My dog somehow opened my coop door while I was at work. My father found the birds after the fact. One was in my neighbors yard killed by their dog. The other two he found in our yard. It looks like my dog just licked all over them, but I am not sure. My oldest hen has feathers missing and one very small puncture at the end of her tail, otherwise just look all slobber covered. However she is having a hard time keeping her balance... she also laid an egg overnight on the roost and I am not sure if it was crumpled from the fall, or from my dog when he got ahold of her. She is not wanting to eat or drink when I was out there, and she is sitting on the floor in a big pile of bedding near the heat lamp along with the other chicken who is sitting next to her for company. The other hen is getting around fine, walking, eating, drinking. All in the norm. I need advice. Should I just wait and see how she does, or should i try and euthanize her. If I euthanize her, what are some humane methods I could use? Thank you.