Just thought that I would add that I was asking out of curiosity only. As this has been going on for years and besides a couple of crop issues being related to 'Eyes bigger than belly' syndrome , I am not concerned about her health as Dusty seems to be pretty healthy. No mites, lice or worms...
Howdy folks
What causes the tips of black chickens' feathers to go white?
This is a picture of Dusty [Bantam Langshan] in August 2014, the white bits are obvious [she moulted in April that year]:
Since that picture she has been all black at times and white tips at others. I noticed...