where can I get medicine to treat respiratory problems or vaccinations for bird flu etc. I can’t find a vet locally to treat my 4 hens
They sound like we would if we had sinus/respiratory issues or when we’re stopped up. Not cackling much at all, sound hoarse. They’re eating and drinking fine.
I’ve also got one I’ve quarantined for sour crop. Been treating her with nystatin for 6 days now. It’s not completely gone down. Don’t know if I should keep isolating her and limiting food or not
Can you post photos of the birds?
Are they new to you - where did they come from?
Where are you located in the world?
What other symptoms do you notice - is there coughing, sneezing, mucous, facial swelling, bubbles or pus in the eyes, etc.?
How much ventilation does their housing have?
Have you added any new stray or bedding that may have exacerbated symptoms?
Any mold or mildew in housing?
Avian Influnenza ("Bird Flu") is a very contagious respiratory disease that has a high mortality rate. There's no vaccine available to the general public. If you were dealing with AI, then your birds would be very unwell and not eating/drinking fine.
Sounds more like you may be dealing with something environmental or possibly disease like Mycoplasma or Infectious Bronchitis. IF what they have is bacteria-like, like MG then you can administer and antibiotic like Tylan/Tylosin, Tetracyclines or Tiamulin to help relieve symptoms. There is no cure for MG and the flock would remain carriers for life. Testing is the only way to know what they may have.
If it's Infectious Bronchitis which is a virus, then antibiotics will not make a difference unless there's a secondary bacterial infection. IB will usually run its course over several weeks and birds will remain carriers for up to a year.
Keeping a closed flock is a wise move to make until you figure out what you are dealing with. Here's some reading about diseases
https://edis.ifas.ufl.edu/publication/ps044
You can get testing through your state lab or through independent labs like Zoologix.
As for the hen with the crop issues, I would offer her some wet feed, make sure she's staying hydrated.
Photos of her and her poop would be good too. Is she laying eggs?
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/