One of my one month old chicks jumped out of her cage this morning and went straight for my older (established) flock. She was making a ruckous running around, and being in a rush myself, I just didn't catch her. I thought there were enough nooks and places to hide till I could get her back into her cage. I was wrong. I found her hidden behind a pallet in the coop with her feathers and neck skin ripped off. This pic is the back of her neck. I know how to treat a laceration, pests, some diseases....but how do I treat this? There is nothing to sew back together. I don't want to give up on her, however, would it be best if I just cull her? Is that too severe?