My neighbors a few houses down brought me this hen just over 3 weeks ago after their dog got a hold of it, ripping out all feathers and muscle from under the left wing and back. I really thought she would die that first night, as the wounds were horrific and the left lung could be seen as she breathed. I have been bandaging, cleaning, and conservatively removing necrotic tissue when necessary. She is recovering nicely, has good appetite, and has regained full use of the left leg which was also injured in the attack. The silver sulfazadine cream I have been using has taken care of the infection and the remaining skin has thickened and is granulating in. She is even growing feathers on her back. My concern is for the dark ridge of tissue just under the wing attachment which is hard and nearly black. Anyone have experience with this level of wound care on a chicken? I am debating the need to soften that dark ridge of tissue and debride/remove it.