Did you know that the African spurred tortoise is the third-largest tortoise in the world and can live to be over 100 years old? They're also not native to Hawaii, but the Makauwahi Cave Reserve has a few that they use to protect endangered plant life, and on this week's episode of Aloha Vet, Dr. Scott Sims goes to the reserve to give these big guys a checkup. Check out the sneak peek above, and make sure to catch the full episode of Aloha Vet, which airs Saturday at 9 p.m. on Nat Geo WILD [1].