I don't know what to do take care of him I don't know how old he is he needs a good home and I don't know why he keeps knowing at his feathers though shaking a lot like his feathers are itchy or something
That does sound similar to preening. What breed is he? Can you get a video of the behavior? To upload a video, you have to upload it to Youtube or another video platform and then copy and paste the link here.