Yes a vet would be the best option.
Yes most on here don't have that option, because we can't afford it or there isn't one close. When it comes to the BYC we are all a great resource to helping those who need it, but sometimes it feels like peoples threads are being taking over by who is right and who is wrong. We aren't there to see the the animal and we aren't vets. We can only go off our knowledge and experience. We all should be able to share what we know without it becoming a debate.
Let's try our best to help the OP without putting others down.
While a qualified vet is the best option, finding a qualified poultry vet is extremely hard to do. We have a few in Minnesota, but they are not in private practice and would not take a call from anyone like us. They work for the large poultry producing companies, Tyson, Pilgrims Pride, Jenny-O, Golden Plump and so forth.
Most your "farm" vets are large animal or horse vets. The others are cat and dog vets, sure they will look at other animals and take your money, but if you talk to them one on one they will tell you old farmers know more about chickens, turkeys and ducks than they do.
They seldom see poultry, they might see a parrot now and then but that is even rare. They studied birds in general in school, but that has been years ago for most and they do not keep up on them, it does not pay.
The other thing is pure cost. Not many of us can afford to spend $100 vet bill on a $10 bird. I know I can't. I try to remember as much as I can from my Dad and Grandparents about how to treat whatever, I think the problem is.
I ask on here and do google searches to see what I can find. Then I wing it on a hope and a prayer and wait for the outcome.
Sometimes, things work, sometimes not, Is that any different than going to a Vet? Sometimes they cure an animal and sometimes they don't.
As much as I like Dux, I cannot believe I am saying this, but if a person is just going to "put down " or contradict whatever a person trying to help is advising why not just not post instead? Why cause the drama?
The OP of this thread and others like this know the suggestion givers are not Vets. They know there is no guarantee, they know the diagnosis could be wrong. BUT they are trying to do something.
Even if that something is learning what they can to prevent it from occurring again or helping this bird to recover.
I am sorry to vent on this thread a tad, but I read a lot of threads,,,,,(and am famous for my DUX advice that no one ever takes for some unknown reason).... that I never say anything on.
Why post if you are not trying to help? I have done many things that are NOT advised by the FDA or Dept of Ag when working on my birds....
The drug companies do not spend the time and money to get many drugs "approved" for poultry, there is no profit in it. We have to improvise.
We also know many of the improvising will not work, but every now and then they do...
Good Luck on you DUX (you may never see me say that again) And try whatever you want that some of the people have suggested. It is your choice...
Have a good day!