So sorry to hear of this tragic loss. having a parrot, Malcolm that has now recovered from a recent broken wing and open wound I know just how worrying this type of injury can be. Do you have any idea on how the injury happened? you may of been waiting for bloods to come back but when I run out of Malcolm's medication I just contacted my avian vet, gave him the latest status of Malcolm's recovery and more medication was issued. I will say with a grey i am surprised they had not put on a collar to stop your grey picking at the wound, many birds will pick at a place that causes discomfort or pain often causing further injury. if you noticed the wing became infected before Ruby passed away it should of been taken to another avian vet if the original vets did not have the staff to cope. was the wing drooping lower than the other side? then the wing should of been strapped in the correct position so Ruby has a chance to rest the wing and let the wing be more comfortable. the cause of poor Ruby's passing may of been owing to the infection but the injury and constant discomfort may of caused shock that can be a killer in birds. One other point is, did the vet clean the wound when they diagnosed Ruby. I would also question why bloods where taken? What was they looking for or suspecting? if a bird had a wing injury then a x-ray may of told them more about the birds wing condition. if your bird had caused the injury by pecking at the spot, this may be owing to discomfort or pain injuring its self and causing the open wound, then a collar to stop more damage should of been put on your bird. I cannot blame you for being annoyed with your vet, (was it an avian vet?) unfortunately nothing I have said will bring Ruby back but hopefully my help if another member finds them selves in this position. I am truly sorry for your loss.