I also agree with Cyn, I am sorry. Think about how Harley feels right now. He is suffering what may be a slow painful death. You do not know if the injections are doing any good to him. It is your call, but if Harley were my bird I would cull him. It would be for the better of the flock, and it would also not make him suffer. The choice is yours though, I know whatever you do it will be for the good of your bird.