Hi Sherry
I agree it is so frustrating when you take the time and effort to gain the knowledge and the Vet works against you. I would also change vets. Sorry your friend has such difficulty.
On the flip side, it is getting harder for health professionals (doctors, Vets, etc) to prescribe antibiotics and antifungals due to all the superbugs that have cropped up. Antibiotics have been overprescribed so much for so long that we now have many bugs out there that are very hard to treat. Doctors, etc are trying to be much more responsible and cautious prescribing these meds because soon we will have new superbugs that we can't treat. One of the hazards of our times, unfortunately.