A warm feather quilt comes from a relationship between an Eider farmer and the Eider ducks. Each neck is marked and protected.
Fishers offshore are, perhaps, not so protected.
Harvest is not always a killing. It can be the taking of surplus feathers after nesting, in return for protection from foxes.
These are simple and complex things. To learn them, go to the far North. It is a tenuous economy, but a proud one, which is more than can be said of most.