Can some here please share their experience and expertise regarding
feather problems in gould amadine.
The following pictures show the condition of my finch.




I am puzzled by her condition especially when you notice the beak
and feet are clear of any symptoms of mite infestation.
Bird is eating well and does not show any sign of stress or sickness.
I have tried and used different things to try to cure the problem
such as mite spray that contains Pyrethrins as well as Scatt and S76.
However nothing seems to work.
Currently I kept about 115 amadine finches and about 5 of them show
this problem.
I really appreciate any comments, suggestions and sympathy given.
I really hope I can get rid of this problem and help the poor bird.
Thank you very much.