Where on the chicken is the wound?
First things first you need to stem as much of the bleeding as you can and and disinfect the wound. Blue Kote should disinfect and deter an other birds from picking at the wound (be warned though it dyes everything is wear gloves). If it gets infected, seek the help of a vet.
If you can't get the bleeding to stop seek the help of a vetinarian.
The hen will be very stressed, apple cider vinegar in the water should help.
I have attached a list of home remedies for chickens like pain relief and great items to have in the house should this ever happen again :
Hope that helps and she gets better soon.Edited by XxMingirlxX - 11/23/15 at 11:06am