@Tmf2117
I have a 35y yo GW female who has had PDD for almost a year now. I will suggest (highly) a couple of things for you to read and to watch. These are the absolute most accurate and most well informed veterinarians about Avian Bournaviral Ganglionueritis (PDD) in the world. Dr. Orosaz and Dr. Dalhausen have done as much research and have published as anyone.
First read;
https://lafeber.com/vet/wp-content/uploads/Avian-Bornaviral-Ganglioneuritis-in-Clinical-Practice.pdf
Then watch;
Join us Friday, July 30, for a special webinar on Avian Bornavirus(ABV) and how it can affect various parrot species. Susan Orosz Ph.D., DVM, DABVP (Avian), DECZM (Avian) will discuss this complex neurologic disease, including symptoms and some therapies that can help.
lafeber.com
First did your bird have the anti-ganglioside assay test? It is the only one that is entirely reliable for positive results.
If your bird is positive, realize that it may not have PDD and may live along healthy life with avian bourna virus. I must be frank though - it is more likely that very young birds will develop the disease and will die from PDD. It is widely believed that the main method of transmit ion of ABV is from the mother through the egg. You should immediately let the breeder know, so he can take the mother out of the breeding pool.
I have kept Kitty (my GW) alive for virtually a year now with full blown PDD and she has other serious health issues - severe atherosclerosis, significant pulmonary hypertensive syndrome and has recently developed pancreatitis. The means for my keeping her alive and pretty comfortable are the wonderful participation by my vet in her health and making sure Kitty has everything that Dr. Dalhausen recommends in his memo Avian-Bornaviral-Ganglioneuritis-in-Clinical-Practice. Plus I started hand feeding her immediately - in macaws the digestive system is more affected than the central nervous system.
After you have read and watched the above recommended materials, contact me with any questions you may have. I will help as muchas I can.