She is about 4 years old has not laid eggs in 2 years. she was fine until 4 days ago. She is walking like a penguin and is week.
I did start Corid yesterday after seeing it on her. Her throat looks a little puffy i felt is and there is just one spot that is hard and it is tiny.
Hi
@cin777 
Welcome To BYC
I'm sorry that your hen is not doing well.
Can you provide us some photos of your hen and her poop?
Can you clarify the starting of Corid - you started it "after seeing it on her" - what did you see?
Her throat is puffy - do you mean her crop? Check her crop first thing in the morning before she eats/drinks it should be empty.
Feel her abdomen - between the legs toward the vent - is there any bloat or fluid?
If she is 4 years old and has not laid eggs in 2 years and is walking like a penguin I would say she is having a reproductive problem. It wouldn't hurt to feel inside the vent just to make sure there is not an egg stuck in there.
Sadly, reproductive problems are common in laying hen - Egg Yolk Peritonitis, Internal Laying, Salpingitis, cancer and tumors just to name a few conditions.
Do what you can to get her hydrated. If you have poultry vitamins add those to her water or direct dose her. Once she is drinking, then offer her a bit of food.
Some hens can rally for a while depending on what's going on, others continue to decline.