Hi, had a fox attack last week. I am NOO expert, I asked for advice myself.
I lost a bunch, this 1 was still alive, but completely laid out in dead chicken position, then she opened her eye. Took her about 24 hours to come around, so yours might be in better shape from the get go.
Make sure she drinks, eats, poops? I started antibiotics in the water because I was advised infection is the worst worry. Also, baby asprin and turmeric in food for inflammation, infection and pain.
She also has injures to wing and leg, but not broken that I can tell, it could be her back, I am in wait and see... but she is getting more strength and movement in feet and legs every day.
I made a sling in a tote with cloth, leg holes and cut out for poo. Maybe yours would appreciate that also?
She liked it for a couple days, but is getting more movement in her legs, knocking her food and water around and likes to rest in a nesting type position also.
I was also advised that chickens are resiliant to injury and healing will be quick like a couple weeks.
Good Luck!
ETA - oh, and disinfect wounds and use triple antibiotic, but NOT one that has has pain killers in it.
And I saw a post in another thread about a rooster that recovered from a broken back, I can't find it now of course...
