Sorry for the late reply!
Taking your advice I called a few vets and asked them if they will take a look at my peahen and analyze her poop. I took her yesterday afternoon when she wasn't freling better.
He inspected and microsocped her poop and told me there are no parasites or parasite eggs in her sample. He told me I should give her the following treatment( some of it is human medication) :
1. Furazolidona - a quarter of a human 100mg pill x 2 per/day
2. Tontil - 2 ml x 2 times/day
3. Viusid - a quarter of an envelope combined with a bit of water per day.
I returned home and started her evening treatment at about 6 PM. She seemed weaker than ever because she hasnt eaten in days. After making sure she swallowed all the medicine I let her sit in her shed for 2 hours. At 8 Pm i came over and checked on her. I tried feeding her some bread and it worked. She ate a bit of that! I am very happy!
I hope tomorrow she will be eating normally again.
Here's hoping she continues to improve!
By the way, I was re-reading your first post, and I noticed that the vet has you giving her quite a lot of medicine every month. I'm trying to figure out what that is about, and whether that may be impacting her. @casportpony, did you happen to see that long list at the end of post #1? @ralgal, can you tell us why the vet has her on so many medications for five days each month? Does the hen have a history of illness?
We are all pulling for her to get better -- hang in there!