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.

I never thought about the use of 3-d printers to make body parts for animals.

It makes a lot of sense.