3-D printing experts often talk about how helpful printers are for rapid prototyping. That turned out to be true in Derby's case. "Having these images on file on a computer and being able to print them is a lot quicker than having to hand-sculpt every single mold and rebuild these braces five, ten times," animal orthotist Derrick Campana says in the video, which was made by the company 3D Systems. Campana, who works for a pet-prosthetics company called Animal Ortho, designed the prosthetics' cup, shaped just for Derby's legs. Then he sent the cup's specifications onto 3D Systems for scanning and further design.