Buttercup the duck was born with his left foot turned backwards, making it nearly impossible and extremely painful to walk. But now he’s waddling again with a 3D-printed foot. Buttercup was born in a high school biology lab in November. Because of his bum foot he was given to Feathered Angels Waterfowl Sanctuary in Arlington, Tennessee. The organization’s Mike Garey, a software engineer, adopted Buttercup, and began searching out solutions to get Buttercup walking again. He landed on 3D modeling company, NovaCopy, which 3D printed Buttercup a brand new webbed foot, based on photos of Buttercup’s sister Minnie’s left foot. NovaCopy knew that traditional plastic used in a lot of 3D printers wouldn’t work because the material is too stiff. Instead, it created a mould that was used to cast a more malleable silicone foot for Buttercup.