Well, the answer to that question is - it is not any specific breed, but one of those wonderful mixed breed dogs - I'm guessing that many different breeds went into making up Chopper (above left) and Harrison (above right).
When it comes to guessing the breed of Harrison and Chopper, I've heard all kinds of claims from exotic breeds to Cairn Terriers? Well, a Cairn Terrier they are not - these dogs are large - about 65 pounds, and don't even come close to the small and compact Cairn. Whenever anybody spouts off about mixed breed dogs being of exotic origin or related from rare breeds, all I have to say is, imagine you owned a purebred exotic or rare breed dog - would you let your champion dog roam the streets impregnating all and sundry? probably not.
In reality, both of these dogs probably come from mixed breed parents and so on down the line - which is what makes them such wonderful dogs. When you get a "mutt" from the local shelter, you are lucky if you adopt one that has all the positive traits from the many breeds it is mixed with. In some cases you get the opposite - a mutt that has all the negative traits, such as aggression and health problems.
Anyway, keep on guessing!! Maybe a DNA test is in Chopper and Harrisons future!!
See my original Travelers Insurance post and video: Travelers Insurance Commercial