Dr. Brian Spear is one of the best certified avian vets in the US. He is based in California but he will consult with you and your avian vet. I did this by email with him and my vet to make sure we were doing all we could for my budgie that was failing with AGY. He brought up the fact that many vets to not prescribe pain medication for birds with a gastric yeast problem. He wrote that it is often painful as GERD is in humans.
Here are the details of anyone would want to avail themselves of his offer to help other birds and owners. I think the photo will enlarge a bit if you click on it.
Here are the details of anyone would want to avail themselves of his offer to help other birds and owners. I think the photo will enlarge a bit if you click on it.