* Popularity fluctuates: Trends change, and what's considered uncommon today might be popular tomorrow.
* Data collection varies: Different organizations track dog breed registrations and statistics, and their methods might differ.
* Regional differences: Certain breeds might be more popular in specific geographic areas.
However, some breeds consistently appear less common than others. These include:
* Norwegian Lundehund: Known for its unique six toes and ability to climb cliffs.
* Otterhound: A rare breed of hound with a water-resistant coat.
* Irish Wolfhound: A giant breed with a gentle nature.
* Komondor: A large, white, corded breed used for guarding livestock.
* Xoloitzcuintli (Mexican Hairless Dog): An ancient breed with a distinctive hairless appearance.
* Catalan Sheepdog: A longhaired, white breed known for its intelligence and loyalty.
Remember, popularity doesn't define a breed's worth. All dog breeds have unique qualities and deserve love and care.