Being that it is almost time to start chasing those thunder birds, I thought I might suggest a few things to help you to save and get good feathers.
First thing is if you cut the wing off the birds, please take the time to put "Twenty Mule Team Borax" on the meaty part. Cut down into the meat and apply a very generous amount to stop the odor/decay/and insects.
Second, take the wings, feathers, how ever you take them off and put them in a freezer for at least a week, preferably two minimum. This will kill anything that is still living in the feathers
If you take them out of the freezer and are going to store them any length of time before grinding or using them, make sure to store them in "AIR TIGHT ZIPLOCK BAGS, OR CONTAINERS" along with a little borax or what I use is cedar pet bedding.
If you leave them out in the open, moths are going to get to them, no matter where you are. So take the time to preserve your harvest and have feathers worthy of making arrows.
And last, if you are going to ship feathers to someone, don't take them out of the freezer and ship them with meat on them if they are not coated very very good with borax and sealed up in a good air tight bag.