Black head?

[Csyoder]

I have a black Austrolorp chicken about a year old. She has been very healthy but this am is acting lethargic and her poop is runny with this green/yellow hue.
They are in a coop with access to an open and closed run. Pine bedding.
I checked her vent, skin and her crop and all look normal. Her comb is still bright red too.
Could this be the start of black head?

 

[Wyorp Rock]

When was her last egg?
Is her crop emptying?
Has she been dewormed?

Since she's acting lethargic, I'd start her on Calcium asap. Give 1 Calcium Citrate+D3 now, then once daily for a week, see if she expels an egg or other material like Lash.

 

[Csyoder]

Awesome. Is that usually at rural king?

I am not sure when he last egg was. They lay all over. I do know we don’t have every hen lay every day.

Her crop is emptying. I saw her eat and drink some electrolytes yesterday. And stand up to forage a bit.

I did give her ivermectin. I had not dewormed them yet. I was following advice from a friend who has had chickens for years and never wormed them. This is my first time. Will be treating from now on. I have now treated the whole flock.