Help! My Eliza isn’t well this morning

[Charisha]

Eliza was her normal self last night…this morning, her comb is purple and she’s sluggish. I lost one of my favorite girls a few weeks ago (unknown cause, pale comb, not purple.)
Eliza is not panting. She is drinking, but I have not seen her eat anything. Advice/suggestions please!

 

[Charisha]

I should add that there she has no visible injuries. No lice or mites. My girls have free run of our 3/4 acre fenced yard.

 

[Wyorp Rock]

How old is she?

When's the last time she laid an egg?

Feel her abdomen below the vent between her legs for swelling/bloat or fluid. Let us know what her crop is like and photos of her poop if she's pooping.

Do what you can to keep her hydrated.
A comb turning purple like that is usually lack of oxygen. I've seen this in hen with reproductive disorders. Sometimes organ failure is a cause as well.