Hippos celebrate special Halloween birthday at Calgary Zoo

Halloween spirit spread all the way to the Calgary Zoo Thursday, as a pair of hippos were treated to celebratory pumpkins. Libo, now 13, munched away on hay and pumpkins with his 32-year-old grandmother, Sparky. Mona Keith, a lead keeper at the Calgary Zoo, said these events are about more than a simple snack. “We just take advantage of it to do something more enriching,” she said. “Our goal as a zoo keeper is to try and keep the animals active mentally, physically, and keep th