I once had a wonderful hen who had a problem with something like this. I'm not sure if it was a hernia or something else, but it was horrible to lose her. She was a great pet and would jump on my lap and sunbathe. We tried softening the bulge with a soak, massages, and lotion and it began to diminish in size, and she started to act better, but suddenly she didn't act right anymore and passed. I'm sorry for everyone else who's chickens have had this problem; it's awful to lose someone you love.
As a comment to Bettyboop7499, I understand your point of view, but I don't think I could ever eat any of my birds, especially not one that I hatched and raised as a part of my family. You just can't eat family.
Oh, I totally understand! My harvesting point was for those who do eat their chickens.
My cat was diagnosed with cancer so I do speak from a place of understanding and empathy. I could keep removing the tumors and let her progress until the cancer killed her by eating away at her brain during which she would be in pain and suffer greatly. I could put her through chemo, radiation and surgery to possibly prolong her life but no garantee and the cancer would eventually enter her bones and organs and brain... I removed the first tumors when the second tumors appeared I choose to euthanize her. Cats hide their pain very well so I couldn't bare the thought of her suffering because I enjoyed having her around and didn't want to let her go. When I read this thread I thought of their suffering...