The quick actions of a German shepherd and his owner saved a Massachusetts man from drowning in a nearby frozen pond. Thomas Walsh was out walking his pet dog, Diesel, near Quarter Mile Pond on the Stoneham and Medford town line when a man called for help after falling through the ice. Diesel heard the distressed man’s cries and alerted Walsh, according to a statement from the Stoneham Fire Department. Thanks to the dog’s sharp hearing, Walsh was alerted to the struggling man. Walsh immediately called 911 and then attempted to calm the man, who was panicking. He was able to instruct the man to crawl on the ice toward shore. Before long, another man who was walking nearby helped Walsh to pull the freezing man off to the shore using a tree branch. The Stoneham Fire Department responded at the scene, where they found the 22-year-old Malden man had made it …