Flydyes.com is the best dye and the most colors for dying feathers, vinegar helps to activate the dying process . I have dried thousands of feathers with this stuff and it WORKS. Rite gives a muddy color Kool aid is not strong enough. Wash feathers with dawn dish wash detergent and spray with 10 present bleach for just a minute ,rinse good. Dye . Use white vinegar in dye mixture and then rinse and use a vinegar bath to set the color. I used a blow dryer to dry feather but skin takes longer to dry air dry skin.