Have you washed the wound? A wound that is cleaned will not have all that blood on it. You should have a raw wound of moist pink tissue, no blood. After the wound is cleaned thoroughly, let it air dry just a bit so the ointment will stick to the tissue.
Do not cover it with a bandage. The chicken will not tolerate it. Keep her in a hospital crate in a quiet place where you can check on her frequently. Give her plenty of water with a little sugar mixed in to counter any shock. Supply her with her regular food.
Clean the wound with soap and water every day, removing any dried out, scabby, black tissue. This is called debriding. It is believed by vets that debriding a large wound actually hastens the growth of new tissue.
You will see a "ridge" developing around the perimeter of the wound where new tissue is starting to grow. This resembles a crater. This is called granulation. The ridge of new tissue marches closer to the center each day until, after about a month, it meets in the center of the wound. The center will usually resemble a hole. That is the last to fill in with new tissue and the wound is healed at that point. Until then, wash the wound each day and keep it moist with the ointment. Do not skip even one day of this daily treatment or the wound will stop healing.
