Ben Fogle and Kate Humble are back for another glorious summer series following the incredible lives of the exotic animals at Longleat Safari Park, and the keepers who care for their every need.The keepers have called the vet to check one of the zebras. She has had a snotty nose over the winter and is now weak. As well as her health, the keepers are concerned that because she's isolating herself from other zebras, the rest of the herd could turn on her. Will the vet and the keepers have to intervene?Also, the keepers have spotted a problem with one of their older cheetahs. He has lost weight and his teeth are worn down. The vets are called to investigate, which means an examination under sedation. The news isn't good - the cheetah has serious kidney failure. One of the most important things the keepers must do now is to help the cheetah drink more water, but how do you measure how dehydrated a cheetah is, and how do you encourage this very fussy animal to drink more water?Elsewhere in the park, Kate finds out how the keepers are slowly gaining the trust of their hyenas. Ben helps keeps the emus cool with a spot of grape bobbing, and Megan helps the keepers weigh the delightful red-handed tamarins and puts the Indian runner ducks to bed. Hamza spends an hour getting close up and personal with a Rothschild's giraffe.