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Kate Humble and Ben Fogle are back at the UK's first ever Safari Park finding out what it takes to look after a thousand different exotic animals. Today some of the world's most endangered species are at risk when a potentially fatal disease has made it onto the estate. 14 lions must be tested, but how can vets perform a hands-on test with each ferocious lion and survive themselves? On the other side of the park, keepers in the giraffe house are on tenterhooks as they wait to see if a newborn calf survives the critical first few days. And it looks a bit like a bear and a bit like a cat but smells of popcorn, will an exotic new arrival be the key to a breeding programme that could save a species?