Could it be mystery illness?

[SkyAJK]

My Wyandotte - Goldie 2 years old - has not lay egg for 3 months now - in summer season - Australia
She does not go to the nest box
She is not molting
Her vent is clean
Soft small stomach
Crop is normal
Eat/drink/poop normal
No lice/mite/worm
Treated for lice/mite/worm

Odd behaviour this week:
Eat/drink less
Small normal poop
Sit quietly with eyes close sometimes
Pushing action at her tail end

I know something is wrong with her, but I don't know what and I noticed she has been gaining weight.

What is wrong with her?

Thank you in advance for your help.

 

[Mrs. K]

Well, probably something is not right, but I do not think there is much you can do about it. Not all chickens live to an old age. A lot of people will try all sorts of stuff. I am sure they will chime in.

You might want a different forum, Emergencies, diseases and ???

Mrs K