On-going unknown respiratory/fungal disease with chickens - several months - hoping for ID support

[allvka_]

[PICTURES PROVIDED IN THREAD]
I have two chickens, one rooster and one hen. They both are free range. The rooster is around 1 and a half years old and my hen is 2 or 3 years old. They are both healthy weights.
Both birds have shown behaviors of shaking heads, itching ears, sneezing, and yawning. This has been going on for several months now, while trying to figure out what they are sick with.
My hen has stopped laying eggs completely.
About 3 or 4 months ago, my hen started showing pale discoloration on her comb/peak. It has gotten better while on voriconazole (antifungal) but has seemed to regress soon afterwards.
She has also started to have diarrhea.
My rooster, on the other hand, has normal poops.
My rooster has developed yellow fungal tips on his comb and has only gotten worse even while on antifungal.
He is losing feathers near the base of his comb.
There are no injuries.
I am unsure how this may have happened, it could have been environmental factors such as an unsanitary coop, toxins from an outside stream of water or contaminated controlled water source.
I have been cleaning the coop every weekend since they have gotten sick.
If anyone has any idea of what this may be and how to treat it, please tell me all you know. Thank you!

 

[allvka_]

Here are pictures of both of my chickens.

 

[Eggcessive]

What is your general location in the world? Do you have any veterinarians where testing could be done? To me the lesions on the comb look like healing pecking injuries. They may appear black, then yellowish brown and later white. Have you checked the ears for any yellow discharge or checked the skin for mites or lice? There are a number of respiratory diseases including viruses or bacterial diseases. Infectious bronchitis virus can cause sneezing, congestion, head shaking, and may affect egg laying. It lasts about 3-4 weeks. Have you seen bubbles or foam in either of their eyes? Some hens may slow down laying after 3 years, or take breaks. If you are approaching winter, many hens stop laying until after the new year.

 

[BlindLemonChicken]

What is their diet?

 

[allvka_]

What is your general location in the world? Do you have any veterinarians where testing could be done? To me the lesions on the comb look like healing pecking injuries. They may appear black, then yellowish brown and later white. Have you checked the ears for any yellow discharge or checked the skin for mites or lice? There are a number of respiratory diseases including viruses or bacterial diseases. Infectious bronchitis virus can cause sneezing, congestion, head shaking, and may affect egg laying. It lasts about 3-4 weeks. Have you seen bubbles or foam in either of their eyes? Some hens may slow down laying after 3 years, or take breaks. If you are approaching winter, many hens stop laying until after the new year.

I live on the far-left side of the US.
I only have a rooster and a hen, and my hen is very well mannered toward my rooster. The lesions are spreading to each tip of the comb, along with the mentioned feather loss on the top of the head.
Previously I had another hen in the same flock who passed away due to aspiration; she had the same symptoms as my current hen. We had her necropsied at a university specializing in these services and their results came up as inconclusive. They thought maybe the aspiration was due to inhalation of food, but it was hard to tell whether the food was there before or after she passed. She also had an egg inside of her and laid not too long ago before she passed, while my current hen has not been laying at all. The hen that has passed was an Americana and my current hen is a Russian orloff.
I have had a vet appointment for my hen several months ago and have been keeping in contact with the doctor over email. We have tried many antibiotics, antifungals and a dewormer and none of them seemed to have much effect. The antifungal I am currently giving them seemed to be working for a week or so but then waned in effectiveness. Maybe it was some other environmental factor that gave them a brief improvement.
When I brought her to the vet the doctor did not see any issues with her ears but did note thick mucus in her throat and a raspy voice. Her weight was normal; if not slightly overweight.
I have not checked for mites or lice recently. However, I would assume that was checked for while at the vet.
These symptoms have been lasting for several months, far beyond the 3-4 week point.
Neither of them have foam or bubbles in their eyes.
There does seem to be some congestion however as both chickens have black crust around their nostrils.
Recently I’ve noticed that the mentioned pale/yellow skin goes further down her neck; I noticed yellow skin below her beak when her feathers were wet.
My rooster does not have this same coloration as this is something that only happens in egg laying hens.
She also has been drinking lots of water compared to my rooster. She drinks so much in fact that when she immediately goes to eat afterwards she throws up some of the water.
She has also been taking many naps.
Would it help you if I sent a picture of her feces/diarrhea as well?

 

[allvka_]

What is their diet?

BarAle organic layer feed, crumble. They have scratch every evening before bed. I also put oyster powder on their food for calcium.
They are both free-range.
Sometimes my rooster jumps the fence and eats a little cat food, but I always catch him early on.

 

[BlindLemonChicken]

BarAle organic layer feed, crumble. They have scratch every evening before bed. I also put oyster powder on their food for calcium.
They are both free-range.
Sometimes my rooster jumps the fence and eats a little cat food, but I always catch him early on.

Why are you adding extra calcium? You said she’s not laying eggs, right?

 

[allvka_]

Why are you adding extra calcium? You said she’s not laying eggs, right?

Because she is calcium deficient; when I brought her to the vet the doctor mentioned an indicator of her skeletal structure compensating for the lack of proper levels.

 

[Eggcessive]

Pictures are always welcome. Is her crop empty by early morning after fasting all night long?