Does anyone know of a good way to separate down from the feathers from a duck or goose that is being plucked? When plucking waterfowl by hand it is at least reasonable to pick each separately although there is still some mixing. We are considering a machine plucker which would make separation of the types much more difficult. It seems there must be some sort of existing method since one can buy articles of clothing or bed linens made of down only with few, if any, feathers mixed in, but my searches have not uncovered it.