Eastport Arts Center’s Open Mic Night on Friday, April 12, will be dedicated to Sadi, the Eastport service dog, who is undergoing treatment for liver cancer. Sadi’s owner, Jeanne Katkavich, will bring Sadi for an appearance at the event and share the pair’s tale. Performers and event emcee Dave Grieco, a confirmed 'dog person,' are preparing to offer anecdotes and songs about canines they’ve known and loved.