Lethargic and weak, non laying, older hen

[Georgia Chickens]

Have a Wyandotte @maybe 3 1/2 y/o.(got from husbands neice yr and a half back) She’s not laid eggs in about a yr. Wk before last, was fine, roaming around, free ranging.
Early last wk, had hard crop. Melted Coconut oil, & mixed in nicely treatbof Meal Worms. All enjoyed. Crop emptied after 2 days of Coconut Meal Worms. Since mid last week, a bit lethargic, moving much slower than norm & not getting into coop @bedtime. I’ve been putting into coop @nite. Still has appetite, but very picky @WHAT and how much she’ll eat.
All getting herbal mix in water. She’s been given a few @least 1/2 syringe of NutriDrench. About to give a dose of Liquid B12 & a dose of NutriDrench.
Had to get her out of coop; being she was too weak. When picked up, could feel prominently feel breast bone. She’s inside, in quiet area. Has wet food w/a few Meal Worms. She’s upset, but 3 hens surrounded her, after she went into corner under coop. Was unsure if they were pecking, due to not being able to see, so I brought her in. Not sure of droppings yet. Is it ok to add a few drops Fire Cider/Master Tonic made w/ACV & specific veggies & herbs to water?
Any info, advice, anything, very much appreciated!

 

[Wyorp Rock]

She’s not laid eggs in about a yr.

3 1/2 y/o.

Since mid last week, a bit lethargic, moving much slower than norm & not getting into coop @bedtime.

Curious what's with the @ signs?

3 1/2years old, not laid in a year. Is she molting?

Any bloat or fluid in the abdomen below the vent between the legs?

Has she been dewormed?

Any lice or mites?

I'd work on keeping her hydrated, giving the vitamins is a good idea.

She may be showing signs of decline due to a reproductive disorder like cancer, eyp, etc., which can be common in laying hens.

Sometimes all we can do is keep them going to see if they will bounce back for a while longer.