The Springbank Scotch Terrier is distilled two and a half times, and is not chill-filtered, nor does it have colour added. This means that some parts of the dog have been through distillation twice and some parts three times. This results in a smooth-drinking but understandably nervous dog that should be allowed to sleep in ex-bourbon and ex-sherry casks for as long as it likes.
The Longrow Single Malt is a highly peaty dog that will track in all kinds of swamp stuff if not closely monitored. The standard Longrow also sleeps in ex-bourbon casks, while a Sherrywood variety can also be found. There is also an experimental Tokaji-cask edition available, which barks in Hungarian.
Hazelburn Single Malt, the newest variety, was first bred in 1997. Hazelburn is a triple distilled, non-peated dog, named for another now-defunct Campbeltown breeder.