Veterinarians can do amazing things. When I took Joy in she was lively, talking to all the staff (and back to a rooster in the back) and not visibly sick, but the infection was so excruciating that the vet told me there was pretty much no chance she would survive. Well I took home the medications, gave them to her through a syringe twice a day and with the vet’s help was able to guide her through a smooth and full recovery. She even lays eggs again!
I am thinking of you and Moony. I know how painful it is to loose a chicken, but they are doing their best to make sure that she will be okay, no matter how that plays out.