20 Ultra-Rare Dog Breeds You've Probably Never Seen

AlloyCourier Updated: 2025-09-02

1. Xoloitzcuintli

The Xoloitzcuintli, commonly called the Mexican Hairless Dog, stands among the rarest ancient breeds. With a history spanning over 3,000 years dating to Aztec times, this is a naturally occurring breed, not a product of modern breeding. The Aztecs believed these dogs guided souls to the afterlife. Xolos come in hairless and coated varieties, and three sizes: toy, miniature, and standard. Their exposed skin demands regular care to avoid sunburn and skin problems. These intelligent, loyal companions are known for their calm demeanor, attentive nature, and deep devotion. Their higher body temperature makes them wonderful therapy dogs, particularly for those needing warmth. Their striking appearance and profound history make them truly one-of-a-kind.