Easy Feathers:
You will need either the Teeth or the Gator Mask (recommended, as you will need it later in the game). Go to a place that has a ball and a goal. Put on the Teeth or Gator Mask so that the other ducks will not steal the ball from you, but instead get scared and run away from you.

Constantly get the ball and keep scoring. Five Feathers will fly out of the goal each time you score. Keep doing this until you get the desired amount of Feathers.