Like everyone said, the main issue right now is getting the feathers dry. A big bag of feathers is a LOT of feathers, so you might not have the space to lay them all out. You can put them in a dryer on the lowest heat setting if they don't smell and you watch to make sure the lint trap doesn't get clogged up. At the very least, they can be put in a cardboard box and mixed together with shredded newspaper. The newspaper soaks up the moisture and the cardboard breathes enough to let moisture out. I used to use borax but now I just throw in a few mothball packets from wal-mart to kill the mites.