His leg was trapped under a log when his owners were away, shriveling up as the days passed.By the time he was brought to the animal hospital, the vet had to cut it off.Now, when a tortoise loses its legs take a long time to learn how to walk again. So the vets 3d printed a tiny wheel and stuck putty right under his shell, gluing the wheel in place, and the tortoise was able to roll around as if nothing ever happened.