Thunder the Dog (also credited as Thunder the Marvel Dog; born September 7, 1921 – death after October 1928) was a male German Shepherd that performed in American silent films from 1923 through 1927. Although Thunder's filmography is rather brief, his six- and seven-reel features were much longer and more elaborate than the films in which many of his fellow canine actors appeared during the silent era. His releases did, though, have to compete in the 1920s with other feature films starring rival German Shepherds such as Peter the Great, Napoleon, Rex, and, most notably, Strongheart and Rin Tin Tin. During his career, Thunder worked for Paramount, Gotham Pictures, and Fox Film Corporation; and he shared screen time with Clara Bow, Dorothy Dalton, William Russell, Caryl Lincoln, and other prominent actors of the period.

From Wikipedia.