A rare antelope at the Brights Zoo in Tennessee died on Saturday after choking on a squeezable fruit pouch, officials announced. Lief was a sitatunga that had called the Brights Zoo home since being moved there from a zoo in Texas July 2016, David Bright, co-owner and director of Brights Zoo, tells Inside Edition Digital. David believes someone must have dropped or given Lief a juice packet that had a hard plastic top, and that the animal might have thought it was a treat and ate it. But unfortunately, as a result, Lief suffocated.