First, trim all the feathers around the wound so they are not constantly getting gummed up in the mess and contaminating your site. Clean the wound out ONCE with peroxide to kill any dog mouth germs. I like to use betadine tea (one part betadine and 10 parts water) for the initial cleanse and then any subsequent cleanings I use either the tea or normal saline depending on how the wound looks. Cleaning the wound thoroughly is very important. Cover the wound in some kind of wound dressing-Neosporin (works well, but is very wet, so may not be appropriate for large wounds), Blukote (great stuff, but burns going on and can be too drying) or Bag Balm (works about the same as Neosporin but is thicker). I would not recommend bandaging the wound unless you have Vet Wrap/Coban on hand to attach the bandages otherwise they will not stay put and the bird will be constantly picking at them and the wounded area. Keep the bird warm, dry and away from her coopmates until she's healed or nearly healed. She's going to need lots of protein to repair the damage- scrambled eggs, yogurt, BOSS and cat food in limited quantities. Monitor for signs of infection- redness, swelling, increase in temp, increase in oozing from the wound and stinky smell. I don't use antibiotics unless I see overt signs of infection, but some folks would use them prophylactically after an attack like this.
She can heal from this. Chickens are amazingly resilient. Good luck. Keep us posted on how she's doing.
