At the beginning of the first film, Beethoven is a puppy who is stolen from a pet shop by two thieves named Harvey and Vernon, who work for the nefarious Dr Varnick, the film's main antagonist. With the help of a Jack Russell Terrier (later named Sparky by the Newtons), Beethoven manages to escape from Harvey and Vernon's van, but is then left to fend for himself after the terrier runs off, chased by Vernon. The next morning Beethoven wanders into the Newton household and his story unfolds from there.
Family and friends
Even after Beethoven grows into an adult dog, he is shown to still be friends with the Jack Russell Terrier who helped him escape from Vernon and Harvey as a puppy. He brings him food, as he is apparently living on the street and helping a hobo gather tin cans for unexplained reasons. When Ted Newton was bullied by the bullies just ouside his house, he drives them away by letting out a growl and preparing to bite them, if they don't stop bullying Ted. When Vernon grabs the terrier by the scruff of his neck during the film's climax, Beethoven breaks out of his cage and chases Vernon, causing him to drop the terrier, showing that he is protective of his old friend. When George Newton was poked in the chest with a stick by Floyd, Beehoven furiously charges it into Floyd's crotch in retaliation and he and Regina fall over the cliff into the pool of mud then into the river.