Tonight, Jonathan Scott is in Tsavo where one of the older orphans, Mweiga, is struggling with debilitating painful joints and a possible heart condition. The keepers are trying her on a new cocktail of vitamins and supplements, but will her medicine work? At the Nairobi nursery, it is time for the mini-matriarch Lualeni to leave her beloved Makena and join the older orphans at the Ithumba release site. But Lualeni does not want to go. Michaela Strachan follows the heart-rending separation. And back in Tsavo, one of the older orphans goes missing.