Florence and Nadine, two of Chester's Grevy's zebras, are both about to give birth. But fixing a due date is almost impossible, so the keepers are keeping a close eye on both of them. Other animals are struggling to produce offspring. Iblis is an Asiatic lion, one of the rarest animals in the world. His partner of five years, Kumari, seems to be losing interest in him. Keepers can find nothing physically wrong with the pair, so decide to put Iblis on a programme of tearing animal carcasses from trees in order to get him into shape. But will it be enough to impress Kumari? Meanwhile, warthog dad Magnum is feeling the pressure of parenting.