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The Chihuahua is the most popular dog breed in Arizona, according to a 2025 U.S. News and World Reports study.

Chihuahuas have a long history in the region, descending from the techichi dogs of the ancient Toltec people.

Their small size makes them compatible with Arizona's hot climate and the mobile lifestyle of many residents.

The results are in: The Chihuahua is the most common dog across the state of Arizona, as it is in many parts of the Western United States.

Earlier this year, U.S. News and World Reports released their updated study for 2025, which showed the most popular dogs across the nation and by state. The nation's overall pick was the Labrador, followed by the chihuahua.

Yet in metro Phoenix, and Arizona at large, the chihuahua was No. 1.

Why is t

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