All chickens die of unknown reasons unless you get the body necropsied. But the best guess with your hen is a chronic reproductive issue that is not treatable. I lost a hen to this issue just last week after trying to treat her with calcium, an antibiotic, and miconazole for the accompanying crop issue. I even tube fed her to keep up her strength. But she died despite doing all that.
I believe the only things you haven't tried are tube feeding and an antibiotic. If you're not ready to give up, you can try those to satisfy your doubts about doing all you could.
I believe the only things you haven't tried are tube feeding and an antibiotic. If you're not ready to give up, you can try those to satisfy your doubts about doing all you could.
I was just reading your post because I have found one of my hens in a similar situation. She didn't come out of the coop right away and she's now walking around puffed. I went to look at her and she had a piece of broken egg shell stuck to her back end with some white poop around it. Was there anything you wish you would've done differently in treating your hen? I have the human calcium that I'm giving her, kind of like you did. Mine has had several soft shelled eggs over the past couple weeks, but she did lay a normal egg 2-3 days ago.