Is the blood flowing or a slow drip?
How deep is the wound and do you have a picture?
If the bleeding is starting to slow down you can start wound treatment, but if it is a steady flow stopping the bleeding with applied pressure will be your first priority.
Shock/wound treatment:
Right now she's in shock and may not eat or drink much for a day or two. She will also seem very lethargic which is normal for shock. Do not force her to eat or drink while she is in shock as it may stress her out more, but I would consider buying tube feeding supplies in the event that after a day or two she doesn't start eating on her own. Keep her warm and somewhere quiet. For the wound it first needs flushed with Chlorhexidine, iodine or a homemade saline solution. Then use either plain old Neosporin (not with paint medication) or a poultry safe wound spray. If you don't have it on hand already I would get some poultry vitamins to give her.