Dudley the duck and his 3D printed prosthetic leg. He lost his leg, and his brother, in a fight with a chicken. The foot was mirrored off Dudley’s good foot to ensure similar sizing. The main structure including upper-leg, lower-leg, connecting pin for joints are made of a stronger ABS. The foot is made out of a very soft and flexible rubber-mimic plastic to allow easier placement / liftoff of the foot.
Photo credit: Terence Loring