If you can keep it from getting infected, or infested with maggots, I would think she could probably survive that. I have seen my turkeys and other poultry in the past live thru a lot of terrible things. If there are no internal injuries, and she is not losing a lot of blood it will probably be okay. Poor thing, that can't be pleasant! I would just keep it clean, and maybe isolate her if there are other birds or they will peck at the wound which not only introduces germs, but obviously will do more damage. Isolating her in a clean area will also keep her from getting any crud in the wound too. I'd at least do that until it starts healing enough that there is not an open wound. If there is one thing I have learned about poultry is that they can certainly live through some awful circumstances.
Not sure about administering antibiotics, growing up we just always used a good wound dressing and let nature take its course. Maybe someone else will chime in about giving antibiotics. But iodine, or some of that purple wound dressing would probably be your best bet.