What dog has not been added to the american kennel club list of recognized breeds?

It's impossible to say definitively which dog breed has *never* been added to the American Kennel Club (AKC) list, as there are countless mixed breeds and new breeds emerging all the time.

However, here are some reasons why a dog breed might not be recognized by the AKC:

* Not established enough: The AKC requires a breed to have a substantial, well-defined population, a consistent appearance and temperament, and a breed standard. New breeds often need time to develop and establish these characteristics.

* Lack of interest: The AKC relies on breeder and club support for recognition. If there isn't enough interest or advocacy for a particular breed, it may not be considered for recognition.

* Controversial origins: Some breeds may have origins in controversial practices or breeding programs, which could deter AKC recognition.

* Functional purpose: The AKC primarily focuses on companion breeds, so breeds primarily bred for working purposes may not be considered.

Keep in mind:

* The AKC's list of recognized breeds is constantly evolving, and new breeds are added occasionally.

* Just because a breed isn't recognized by the AKC doesn't mean it's not a legitimate breed or that it's not a good dog.

If you're interested in learning more about specific breeds, I recommend checking the AKC website or researching reputable sources like breed clubs or organizations.