Wolf Blood. The oldest remaining werewolf film. A silent feature, also known as Wolfblood: A Tale of the Forest, is a 1925 werewolf movie starring George Chesebro, who also directed it.

Dick Bannister is the new field boss of the Ford Logging Company, a Canadian logging-crew during a time when conflicts with the powerful Consolidated Lumber Company, a bitter rival company, have turned bloody, like a private war. His boss, Miss Edith Ford, comes to inspect the lumberjack camp, bringing her doctor fiancé with her. Dick is attacked by his rivals and left for dead. His loss of blood is so great that he needs a transfusion, but no human will volunteer, so the surgeon uses a wolf as a source of the blood. Afterwards, Dick begins having dreams where he runs with a pack of phantom wolves, and the rival loggers get killed by wolves. Soon, these facts have spread through the camp and most of the lumberjacks decide that Dick is a werewolf.

George Chesebro – Dick Bannister.
Marguerite Clayton – Miss Edith Ford, owner of the Ford Logging Company.
Raymond "Ray" Hanford – Dr. Eugene "Gene" Horton, Edith's fiancé.
Roy Watson – Jules Deveroux, envious owner of the Consolidated Lumber Company.
Milburn Morante – Jacques Lebeq, notorious bootlegger.
Frank Clark – Old Pop’ Hadley, alcoholic woods guard for the Ford Logging Company.
Jack Cosgrave – Edith's uncle and manager.