Greetings, I am Dr. Pat. I have worked with birds for many years. I will do my best to help you.
I am sorry no other expert has taken your question. We all come online at different times, I have just logged in and saw that you have not been answered. I hope I can still be of assistance.
What part of the UK are you in?
Can you upload or share a photo?
There are many virus and bacterial infections that can contribute to what you describe. As well, parasites and fungal infeftions can complicate matters.In addition, nutrition issues are VERY common in peafowl and can both cause and exacerbate pre-existing conditions. They should be on a pelletd diet formulated for pheasants and quail, NOT chick feed or chicken pellets. Malnutrition is very common and leads to general health decline, failure to thrive, and immune deficiency.
These signs are of a very sick bird, and not specific to any one disease. And that means it is not fair to you or the bird to guess, there are so many possibilities.You are going to need local help on this, and a scientific and solid diagnosis to find safe and effective treatment.
For right now, you can use plain artificial tears (for humans) to clean and lubricate the affected eye. Put drops in both eyes and both nostrils. Do not use anything else.
She is in very serious trouble, and needs local veterinary attention. These signs are of a very sick bird, and not specific to any one disease. And that means it is not fair to you or her to guess, there are so many possibilities.You are going to need local help on this, and a scientific and solid diagnosis to find safe and effective treatment.
You can examine the bird thoroughly again, including opening the mouth and having a good look in there for mucus, redness, masses or anything else unusual. You can take the temperature gently with a rectal thermometer. Anything above 105F/40C is significant. Palpate the tummy for an egg, fluid, lumps or anything else. Check all the joints for swelling, pain, and mobility.
Move the bird indoors to an aquarium, box or carrier with soft towels or hay in the bottom, no perch, and food and water in low bowls that can be reached easily. Keep her partially covered, warm and quiet.
Do not try to force food or water. You can offer warm cooked rice, pancakes, cornbread, grapes, melon, greens in addition to normal food.
Without a diagnosis, I cannot recommend any particular course of treatment, except good nursing care at home.
I know it is expensive, but you may not have many home options, because the first thing you need a vet for is to find out what is going on. Treatment is only as good as the diagnosis. If you call around, you may find a vet to work within your means.
She needs to see an avian/poultry-experienced veterinarian ASAP for complete examination, diagnosis and appropriate treatment. Check
The expense for this is going to be a lot less than inefficient, ineffective, dangerous treatments, guesswork.There are poultry diagnostic labs that charge very reasonable fees to test for common peafowl diseases. In the UK, check:
You can check with the closest Ag university with a poultry department, or with the closest vet school for a local referral.
If this were my patient, I would start with complete fecal analysis and direct smear, stained with Sedi-stain and unstained for multiple parasites, fungi, spirals; direct smear stained with Sedi-stain and unstained of the oral cavity; bacterial culture and sensitivity of the feces and choana. Depending on the case I might do a fungal culture. Routine blood work is necessary to rule out other issues. There are MANY DNA/RNA tests for bird diseases. Ultrasound is often more informative than radiographs and does not require anesthesia (ask your vet about this option). Generally I start them out on medications as indicated by the tests.
Pet/feed store medications and home remedies are harmful, ineffective, immuno-suppressive, and make them much worse and may interfere with the veterinarian's diagnosis and treatment. Do not use them.