Sorry to hear that. I reacted the same way and told my wife this girl is too far gone, but luckily I found this avian vet, and she told me chickens can recover from pretty severe injuries. Her cost was so reasonable too, that we took her there. She was $35 for the office visit, $20 for two antibiotics, and quoted us $60 if she had to stitch her. The stitching ended up being way more than expected ,so it ended up being $199 for everything. I think that was a pretty good deal.
Wow … here, in 'the valley' as it's known, some pay the better part of that just for walking through the door w/ an animal they hadn't previously seen (among the reasons I'm been the 'technician by attrition' down through the years ~'-)