However, in nature the deformed organism isn't likely going to survive and reproduce, and even if it did the deformity is likely to be developmental, not genetic. Even if you did raise it to adulthood in a controlled environment and the defects were genetic, vestigalism does not happen in the next generation. The time required would far outlast our lifespan, so we would never see the results. And yes, I know vestigalism is not a real word.