20 Rare Dog Breeds You’ve Probably Never Seen Before

1. Xoloitzcuintli

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The Xoloitzcuintli, or Mexican Hairless Dog, dates back more than 3,000 years to Aztec times. Naturally occurring, not engineered, it was believed to guide souls in the afterlife. Hairless and coated varieties come in toy, miniature, and standard sizes. Their bare skin needs sun care, but their warmth and devotion make them superb therapy companions.