Feathery fans to wave around and make everyone sneeze. Eventail Duvelleroy, Paris. An old firm that got a recent reboot. All of these from their website which you can find at eventail-duvelleroy.fr.

I’m no expert but they collect the feathers when the birds molt. As far as I know all birds molt. In any case, the feathers would have to be sustainably sourced as there is essentially no market for anything new with feathers that someone went out and shot a bird to get so nobody would bother to make anything from them as you can’t sell them.