Philadelphia Zoo Marks Birthday Week For Its One-Year-Old CatsZoo visitors sang to the birthday boys -- first for Lucha, a jaguar cub, and then for Dian, a snow leopard, both born at the Philadelphia Zoo, less than a week apart, last year.
Philadelphia Zoo's New Snow Leopard Cubs Meet An Enraptured PublicThe brothers were born June 9th and have since grown to about 28 pounds each.
Surgery Successful For Philadelphia Zoo’s Snow Leopard CubsWorking with Penn's School of Veterinary Medicine, zookeepers spent weeks preparing the cubs for the three-hour process, which cuts out a defective portion of the eyelid.