bleach, never.
anything you do to 'color' a feather will kill the natural feather oils. leave 'em be and enjoy the benefits of natural feather waterproofing.
typically, water fowl have more oil than land birds. natural goose feather fletches are perfect for hunting, and canada geese feathers are free for the taking during the moult over a wide area of the usa and canada ...
woodie or carbon ...
5 minute running water test - processed turkey and natural canada goose ...
add faux fur tracers for better in-flight visibility ...