I don't know for certain what's going on with my hen. I was sure it was a broken, soft shelled, egg. But she's still not eating. She seems to feel a bit better, but she's had 1 bite of egg and 1/4 of a grape since FRIDAY.
Thread 'Possible internal broken egg? Ideas for treatment.'
https://www.backyardchickens.com/threads/possible-internal-broken-egg-ideas-for-treatment.1684149/
I thought it was a broken, soft-shelled egg. But she's had one bite of egg snd 1/4 of a grape in 4 DAYS! Her poo is runny yellow with black in it, but she's not eating, so I don't know what to do.
I can't find a vet that treats chickens.
The Corid is a name brand for Amprolium, won't hurt her, its a Coccidiostat not an antibiotic, but it may not help.
Looking at your other thread, the poop, the soft shelled membrane and your description I would say she's having a reproductive issue.
I'd work on hydration. See if you can get her to take sips of sugar water or electrolytes. Once hydrated, offer wet mushy feed, bits of egg. Sometimes melon or tomato are also interesting. While we want her to eat her feed, the goal is to get her eating a little something if possible.
I'd also give her 300mg Calcium Citrate+D3 once daily for a week and consider an antibiotic. Amoxicillin is a good choice. You can find Amoxicillin
HERE. Give her 250mg twice a day for 7-10days.
She may have some lash material to expel or these symptoms can be signs of EYP, cancer, etc. It can be hard to know. The medications may not help, but its sometimes worth a shot to see. Sometimes they bounce back for a while.
She has perhaps intestinal shedding in the poop, but the substance could also be something else.
I'm sorry she's not doing well, it's the pits when they decline like this. Often all we can do is offer supportive care, see if they improve and if not, then kindly put them down.
Let us know how she's getting along.
Example of Calcium Citrate.