Posted by Farrah Paul, Communications Photos by Jeremy Dwyer-Lindgren/Woodland Park Zoo 14-year-old Shila was diagnosed with a life-threatening cardiac arrhythmia. Woodland Park Zoo’s 14-year-old female gray wolf, Shila, has received a pacemaker in an innovative and groundbreaking medical procedure to treat a life-threatening cardiac arrhythmia. The successful procedure took place June 12, and Shila is recovering well behind the scenes. While pacemakers are common treatments for humans and domestic dogs, a wolf receiving a pacemaker is extraordinarily rare. Woodland Park Zoo’s team is not aware of any previous cases and believes Shila’s pacemaker may be among the first for her species. Shila's procedure to insert this pacemaker may be among the first for her species. Background In early June, animal keepers observed concerning behavior from Shila including decreased activity and appetite, weight loss, and concerning instances of stumbling, weakness, incoordination and falling. Th...