Dug is the tritagonist of Up. He also appears in Dug’s Special Mission and the upcoming Disney+ series Dug’s Days as the titular protagonist, and in George & A.J. as a minor character. Dug is a golden retriever who belongs to Charles Muntz. He is a fun-loving dog who speaks English via a special collar that translates his thoughts into speech, invented by his former master, Charles Muntz …