Chief

Chief is the name of Amos Slade's older dog, he speaks in a strong Southern accent and serves as a surrogate father to Copper, he is a proud hunting dog and tries to rub his traits onto Copper but at the time he is a pacifist and doesn't want to hurt other animals, he comes to hate Tod and tries to kill him when he bothers him while he's trying to sleep causing him to chase him with his doghouse still attached to him, eventually he loses Tod when he falls into a pond, later when Copper is older Chief's teachings are starting to rub off on him and he becomes a skilled hunter, later when Tod is set free Chief chases Tod across some railroad tracks and Tod tries to warn him that a train is coming but he won't listen he ends up being struck by the train and falls into a pond below Copper confronts him and he seemingly dies and Copper swears revenge on Tod, later we find out Chief survived the fall and he ended up with a broken leg and he takes advantage of the situation but Amos refuses to pamper him, later at the end of the movie he talks with Copper on how Amos is starting to warm up after Tod saved him and Copper from the bear and tells him it serves him right having a broken leg himself.