Beethoven

A runaway St. Bernard puppy is adopted by a suburban family despite the protestations of their uptight father. Of course, the rambunctious little thing grows up to be a slobbering mountain of a dog. But the troubles don't stop there: an evil veterinarian plots to steal "loveable" Beethoven for his own twisted experiments, while a conniving yuppie-couple scheme to take over Dad's business. But it's good old Beethoven to the rescue -- he'll save the day! (official distributor synopsis)