Poor thing! Did you get a chance to examine the damage? Are there any deep wounds? I would try to assess the damage and rinse out any wounds you find. Be sure to examine her all around. Apply a thick coat of ointment such as neosporin without pain relieve in it to the wounds. You’ll want to keep them moist to heal better. Keep her somewhere warm, dark and quiet, separated from the flock if she has exposed flesh and open wounds until they scab over or aren’t noticeable. Offer her sugar water and electrolytes to treat for shock right away if she isn’t acting herself - puffed up, isolated, lethargic. She may respond to an offering of raw or scrambled egg, too. You may have to use a syringe or dropper and drop some on the side of her beak to get her to drink some of the electrolytes/sugar water.