I'm going through the same thing. I'm so sorry! my heart breaks for you, and your ekkie. There really can be medical issues contributing. I adopted an ekkie, and brought him to the vet the first week I had him. Who referred me to a avian vet who is amazing with my ekkie. I found out that my ekkie had medical issues going on contributing to his feather plucking. I would always recommend taking any parrot to the vet whos feather plucking to do a process of elimination. Avian vets are very hard to find. I know mine does online counseltations. I hope more vets can go to this because us parrot owners have to rely on one another in situations that are not ideal. Not to mention that different parrots have different needs which makes things even more difficult.