I have a young pigeon that was hit by a hawk and survived. The skin was pulled from the top of the head and around the neck. The wound covered most of the pigeon's head. Today I noticed that she had a new squab. Looking at her one would never know she had been hurt so bad just three months ago...
There's no guarantees, but I have seen many severe wounds on birds heal and , remarkably, feathers have filled in. As long as she is eating and drinking she will likely do well and heal. There may be a few bare spots. She will go on to live a normal life.
Keep her separate from the flock until...