The Johannesburg Zoo is calling on city residents to donate food for their animals. The zoo recently sent out a request to anyone who may have spare leafy branches ranging from Sickle bush tree,Tamboti, Knob Tree and  Bush willow to name a few.  Zookeepers are said to be  struggling to provide food for the herbivores, especially during the winter months.We spoke to Jenny Moodley, Spokesperson for the Johannesburg City Parks and Zoo.