Last spring, we rescued an adorable three-legged Bichon pup named Luke - as in Triwalker. It is amazing how well he manages despite only having one hind leg. He positions his back paw toward the center to balance his weight, and unless he is walking slowly - when he has to hop - it's hard to tell he is three-legged. But we worry that as he ages he will develop arthritis or other ailments. So we wonder if someday he'd benefit from a 3D printed prosthetic.
Of course, it is the design element and not 3D printing that will be challenging. So I found this story about Derby to be so heartwarming and inspiring. Watch how 3D modeling and printing gave him new legs and a new "leash" on life.