Beethoven

Beethoven, a lovable St. Bernard puppy, escapes from dognappers and finds his way into the hearts of the Newton family. As he grows into a massive, slobbering adult, Beethoven brings joy and chaos to the family, helping them overcome their problems and teaching them the importance of unconditional love. However, a sinister veterinarian named Dr. Varnick has a secret and deadly sideline that involves experimenting on dogs like Beethoven. When George Newton discovers Dr. Varnick's true intentions, he must fight to protect his beloved pet and expose the doctor's nefarious plans before it's too late.

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Some movies that have similar genres and were produced around the same time as Beethoven include The Princess Bride, Hook, All Dogs Go to Heaven, The Little Rascals, Beethoven's 2nd, Corrina, Corrina.