My hen is dying!

[BauerWFarm]

Okay, I'll tag a few more people who know a lot more than me. @Jenbirdee @SmiYa0126 @luckycluk

Thank you! I Appreciate the support and advice very much . I feel like I’m not doing all that I can, however at the same time I’m doing whatever I can to help her…. I’m just tired… I’ve kept her inside today in a spare bathroom… so she had time to just sleep and rest.

 

[LaFleche]

Inspect her closely for bloodsucking poultry mites as they can leave a bird weak and anaemic in no time.

You said to have noticed a bad odor. She might suffer from a crop disorder such as sour or impacted crop.
Check if her crop empties properly over night. Feel early in the morning right before she has anything to eat or drink.

https://www.backyardchickens.com/articles/how-to-treat-sour-crop-and-impacted-crop-and-how-to-know-which-one-youre-dealing-with.73607/