Feathers all the way , do a search as sugested , you'll have hours of reading .
If Im lucky enough to shoot an animal I wash the blood of in a stream usealy and when I get back to camp make sure its clean , get the feathers wet and use a hair dryer to fluff them back up , then you can put fletch dry on them to keep them from absorbing rain and sutch , works as good as the teapot method , piss'es the wife off though