Lethargic Hen

[Chicken Man Can]

For several days one of hens is lethargic, sleeping most of the day, and not eating (but does drink). Her condition is stable, neither improving or worsening, and I don't know what it is. Her crop is not full, I gave her layer pellet / epsom salt soup which she liked and lapped up. Any ideas?

 

[GodLovesU]

Is she an older bird?

 

[Chicken Man Can]

Is she an older bird?

6 months to 1 year.

 

[Chicken Man Can]

Update : She's recovering. Epsom salt and apple cider vinegar in water helped.