This is Derby.
Derby was recovered by Peace and Paws Dog Rescue, whose owner, Melissa Aronson Hannon, told BuzzFeed Life that she had heard about him from a friend.
Though Derby was equipped with a set of wheels for running around, Anderson said that she could tell from the beginning that Derby was a high-energy dog who needed to be able to run and play a bit more freely.
In August, Derby was adopted by the Portanova family, who saw him through the rest of this printing process along with Anderson.
Stephanie Portanova told BuzzFeed Life, "We were amazed, he took off running."
Anderson explained that the printing process used for Derby's prosthetics, called MultiJet printing, allows the production of a prosthetic containing both rigid and flexible materials.
It made it possible to have an ample amount of cushiness in the cup of the prosthetic for supporting Derby's elbow, as well as a perfect amount of rigidity for the treads on the rockers that would come in contact with the ground. Just like fluffy UGG slippers.