Well, that depends upon what is wrong.
It also depends on you NPIP certification. If it is any of the illnesses that you are certified for, you are duty bound to report it. (And you'll have to look at your state's NPIP documentation to see what your requirements are and the diseases monitored.)
The illnesses covered (as you know) by NPIP generally are (taken from the NPIP website):
The development of the NPIP was initiated to eliminate Pullorum Disease caused by Salmonella pullorum which was rampant in poultry and could cause upwards of 80% mortality in baby poultry. The program was later extended and refined to include testing and monitoring for Salmonella typhoid, Salmonella enteritidis, Mycoplasma gallisepticum, Mycoplasma synoviae, Mycoplasma meleagridis, and Avian Influenza.
Since MG and AI can cause the type of gurgling you are experiencing with this hen (albeit so can other things), I think in order to keep your NPIP, you have to take her to the vet to rule out any of those diseases.
As to what it could be. It could be a mild non-monitored viral illness and will simply pass, such as Infectious Bronchitis, which can produce gurgling. BUT...It could possibly be Avian Influenza, something that is very much monitored.
A lessor virus, such as IB (which can kill susceptible individuals, while others have little more than the sniffles) simply requires TLC, food/water, electrolytes/vitamins in water. You can add garlic (a good anti-viral) into her mash if she is eating. I've also added Elderberry tincture to the water (a couple of tablespoons to a gallon) which is also anti-viral.
But again, since you are following the NPIP program, I believe it is within your certification requirements to have any ill bird tested that exhibits symptoms that could be one of the listed illnesses.
Sorry.
LofMc
http://www.poultryimprovement.org/d...03a6591d2-42D59D9F-C7EB-6A43-476EE947B8A9CAED