Difficult dilemma: One remaining chicken was attacked by a raccoon and may actually survive. When i

Hi. I have a chicken that hasn't eaten for an entire week after a bite/injury. She had bleeding on her comb & head and teeth marks on her sore neck. I bought some Ensure finally thinking the vitamins/minerals would help her heal. I feed to her in a child medicine syringe. She drank water on her own (in front of me) only one time. Otherwise about 2 or 3 times a day, I go down to the basement to give her antibiotics and dip her beak in water. Theres a silver dollar size opening on her side. I noticed 2 maggots popping out of the corner, but too quick for me to grab. I quickly doused them with my contact lens solution. Not sure I was able to get every worm the solution. I know the solution definitely gave her some pain that she couldnt reach cause of her sore neck. It's my fault not closing the coop one night about a week ago. Most likely it was a raccoon that dragged her through 2 acres of my property. She's a rather large Colombian Rock and the "queen" of the flock. She used to try to crow like a rooster. Now one eye is injured and keeps it closed shut. She's getting stronger but after a week is still forgetting how to eat. Not sure if it's from intense pain, shock, or a brain injury.