I just saw, and read through this thread. I have to suggest that Marek's be considered. When zooming in on the eye I see a graying ring around the pupil. The eye itself just doesn't look quite right to me. I have birds with ocular Marek's and it starts like this, and tends to be very slow progressing. That might also explain the bumps at the base of the feathers (cutaneous form). I could be VERY wrong, just felt it should be mentioned.
For the white feathers (I can't really see them in the pictures. I've had birds get random white feathers that in my flock have been either genetic color leakage (from mixed breeding), or have been brought on by injury or stress. I've had birds get some after molt and then lose them at the next molt and get regular color back. I have a GLW roo that got white feathers after a terrible bout with bumblefoot.
For the white feathers (I can't really see them in the pictures. I've had birds get random white feathers that in my flock have been either genetic color leakage (from mixed breeding), or have been brought on by injury or stress. I've had birds get some after molt and then lose them at the next molt and get regular color back. I have a GLW roo that got white feathers after a terrible bout with bumblefoot.

