Where do you get your water from ? ? ? City water, spring water, well water?
We have recently been discussing giardia infestation and self-mutilation is a symptom of the disease.....there has not been anything in the local media about giardia has there ? ? ?
You need to keep the cone on your bird or you might be taking it in for an amputation...and...still not have found a solution for the mutilation.....if it is in fact giardia, it is a parasite often ingested from contaminated water...one test may not show the disease...tests are run on the bird's feces and the disease does not always shed in every presentation a bird makes...so...your vet may well have to take 1-3 or even more samples before it is pinned down.....
You need to ask your vet if they are familiar with both the testing and dealing with giardia in birds.....if it is found to be giardia and the ER vet did not check for it, I would ask for my $$$ back.....even to ask which TV station they prefer investigating their practice.....
With giardia, a bird may start itching in a particular area and/or feel like something is crawling under their skin...which it may well be.....
Even going to a different vet may be necessary, but you really want to know...BEFORE...you take your bird there, if the vet has experience testing for, dealing with & treating giardia.....if they do not, you really don't want them learning on your bird & your $$$.....
If there is no vet in your area with experience, call the U of Penn. Vet. Med, School Clinic & ask them for their advice: 215.746.8387 between 8:30 a.m. -- 4:30 p.m., Monday through Friday.
They may even know of vets in your area who might treat a bird via telephone consultation with the school.....
Good luck.....