Update:
She is eating and drinking still, and she is much more active. The wound seems to be healing fairly well... We are making sure that it stays clean and we have been giving her electrolytes and a vitamin supplement. Thank you so much for your help.
Okay, so just as I got home, I saw my flock flying over to where I was, I heard one of them screaming, so I ran to see what was the matter. I found a chicken in the mouth of a fox and I successfully scared it away. I got the hen (a buff banty cochin) and she isn't really bleeding too much, but...