Animals, specifically our pets, can also benefit from technology. Living proof is one happy dog named "Derby" who was born with deformed front legs. He gained increased mobility with a two-wheeled cart, but it restricted his ability to play with others. Then his owner found 3D Systems whicht was able to custom design and 3-D print a pair of prosthetic limbs Derby can use almost as well as real legs. He is about to be fitted with the fourth improved iteration which is more of a normal length for him. The computerized printing process makes design and development less laborious. Watch Derby enjoy his new freedom: