At first, Old Yeller causes trouble such as scaring the Coates' mule, Jumper, and stealing food from them, which angers him deeply. However, after he saves Travis's younger brother, Arliss, from a mother bear, Travis changes his mind and grows fond of him. They become good friends and work together to keep the farm in order and safe. However, one night, when a rabid wolf attacks, Old Yeller is bitten during the fight and gets rabies as a result. Travis is distraught about this, and reluctantly has to shoot him. Afterwards, he makes a grave for him and buries him in it. Then he starts raising his son, Savage Sam, planning to make him be just like his father.