Here's a picture it was disturbing to see that's for sure, I was positive she was going to die. I'd just spray twice a day, I would stop using saline. It smelled horrible for a couple weeks I assume it was infected and eventually cleared up. Hopefully your chicken heals like mine did
I had a chicken with a very bad hole you could see the spine and organs. I sprayed veterycin on the inside of her, took about a month and she fully healed.