In most incarnations of the series, Scooby is regarded as a unique Great Dane dog who is able to speak in broken English, and usually puts the letter  R  in front of words and noises made. Other incarnations, such as A Pup Named Scooby-Doo, present talking dogs as quite common in the larger fictional universe.cooby-Doo, Where Are You! premiered on CBS on September 13, 1969 at 10:30 a.m. EST and ran for two seasons, for a total of 25 episodes.