Look up the DMG for your bird Vetri-DMG - Antioxidant Supplement for Dogs & Cats - 1800PetMeds
Vetri-DMG Liquid (Vetri-Science)
What is this product used for:
Vetri-DMG for use in dogs, cats and birds is recommended to help support proper immune response, cardiovascular and skin health, glucose metabolism and proper nerve and brain functions.
Also, do not worry about the anesthesia. You have to do what you have to do. If you have a good vet, they know what they are doing.