Feathers

Feathers are dropped by Chickens. 6-10 feathers per chicken.

Crafting
Bed: 15 Leather/Cloth, 6 Wood, and 5 Feathers.

Pillow: 20 Feathers, 10 Cloth, and 14 String.

Arrow: 3 Feathers, 2 Wood, and 1 Arrowhead.

Trivia
You can tickle someone with a feather, disorienting them.