This 1860s-era drama starring a mutt and his two young masters takes a dark turn when Old Yeller is bitten by a rabid wolf, goes mad and starts foaming at the mouth. The tear jerker’s defining moment happens when the main character, a boy named Travis, is forced to shoot Old Yeller to protect his family. Travis becomes a man, men in the audience become weeping boys, and Old Yeller is written into film history as the ultimate canine tragic ending.