More: Like humans, dogs come with different levels of athleticism and capability. Despite only having 3 legs, Tom runs with the best of them and somehow manages to keep up with Willa! Both are rescues—Tom lost his back leg because of abuse in his first home; Willa was dumped in a park, half dead from Parvo. They are both survivors and have brought us much joy. Neither are intimidated by the despite the occasional setback, some of which invoke being coned.