Chief is one of Amos Slade's hunting dogs in The Fox and The Hound. He is the secondary antagonist of the film.
Chief is usually mean and has a bit of a short temper. Even though he used to hate Tod with a passion and tried to kill him (along with his master Amos Slade), he was always nice to Copper and was kind of like his foster father and mentor like Shadow.
The Fox and the Hound
In The Fox and the Hound, Chief is one of Amos Slade's hunting dogs. Even though he was at first initially dismissive of the young puppy that Amos intends to train as a hunting dog, he developed a liking to the hound puppy named Copper, and becomes a surrogate father figure to him. Chief usually stays around his doghouse for the first part of the movie, but is responsible for chasing Tod when the fox comes to see his best friend Copper.
Later, Chief accompanies Amos and Copper on a winter long hunting trip. Chief teaches Copper many things about hunting. By springtime, Copper is now fully grown and a trained hunting dog, and has actually topped Chief, much to the Trigg hound's chagrin. That night, even though Copper reveals in his success, Chief notes that Copper's tracking skills aren't enough to be a good hunting dog, and that Copper must learn to think nasty.
When Tod (who is also fully grown) returns to see Copper that night, Chief wakes up and alerts Amos to the fox's arrival and the two try to kill Tod. Even though Copper allows Tod to run away, Chief spots him and chases Tod onto a railroad track. Chief is hit by an incoming train, while Tod ducks under the vehicle. Though Chief survives, he is hurt real bad and left with a broken leg. Chief tries to milk his injury to regain Amos' attention, but Amos sees through Chief's attempts and tells him to go back to his room before he breaks his other leg, and Chief does so and limps back to his room, whimpering.
Chief isn't seen again until the end of the film where he and Copper watch as Amos gets his injured leg bandaged by Widow Tweed, Tod's former owner. Chief might have also learned from Copper that Tod isn't a bad fox after all.
His voice is provided by Pat Buttram
The Fox and the Hound 2
In The Fox and the Hound 2, Chief has very few lines and very little screen time as opposed to the first film. At the beginning, Chief is seen interacting with a young Copper. Later on, Dixie tells a young Tod to go wake Chief up and have him chase him down to the circus. Tod then goes into Chief's barrel and bites the wolfhound mix on the ear, and he hits his head on the top of his barrel and sees Tod, who then blows a raspberry at Chief. This results in the wolfhound angrily chasing the little fox to the big top circus. His barking noises and voice in this film is performed by Rob Paulsen.
It is unknown what happened to Chief after those events. However he is seen during the final "We go together," first chasing Tod and Copper, but gets chased himself by grasshoppers and trips over apples along with Slade and Tweed.