Can you post a picture of her. Is her head puffy or is there a swollen area?
Sorry for your loss. I wouldn't feel bad about trying to help her because the tumor would likely have killed her eventually.A very sad outcome, I am afraid... My Primmy died during surgery to remove the mass. It was most definitely a tumor, and it was growing, so I didn't have any choice but to try to have it removed, but I can't help but feel like I caused her death. She was my favorite, my mama chicken, and I wept like a small child when she died... I still miss her.
How is your hen doing? Her tumor look like it covers her left ear. Has it grown since this picture?
I did get an image from the front and back. She's one of our least tame chickens as well, so she doesn't like having her photo taken, let alone picked up much to closely examine, unfortunately. She also didn't like it when we did put her in the garage in the hospital cage (completely restless and tries to get out when putting in food and water), so we put her back in the coop. It seems to have possibly shrank a bit in size since taking these pictures a few days ago, but definitely still a lump on her head. No new scabs or blood at least, so we'll see if feathers start growing back.
