Thats great to know, thank you. That does sound very similar. Her abdominal cavity is definitely unscathed and no organs are visible (the vet had a good poke and said it was completely sealed).
I recently purchased two white Orphington hens, around 18 months old.
We noticed as soon as we brought them home that one of the hens had an odd black patch on her side. She was eating, drinking and pooing fine so we left her to settle for a few days before investigating. It looked like a...