Collecting Feathers
When you defeat adult ducks, they drop both meat and feathers. Tamed ducks also shed feathers over time, giving you a renewable source without constant hunting.
Crafting 
Duck Feather Arrows
Use duck feathers as a direct substitute for regular feathers in arrow crafting recipes. Combine a duck feather with a stick and a flint point to create Duck Feather Arrows.
These arrows function identically to standard arrows—they're useful when you have excess feathers from your duck farm and need ammunition.
Scaling Production
The more ducks you tame and keep in your farm, the faster you'll accumulate feathers. A large flock provides a steady supply for arrow crafting without depleting your feather reserves. This is especially useful for players who rely on bow combat or need bulk arrows for mob farms.