Here's why:
* Popularity: Chihuahuas consistently rank among the most popular dog breeds in the world, according to the American Kennel Club and other breed registries.
* Size: They are truly tiny, making them easily manageable for apartment living and even easier to carry around.
* Personality: Chihuahuas are known for their big personalities and affectionate nature, often considered "pocket rockets" for their bold attitudes.
While other toy breeds like the Yorkshire Terrier, Maltese, and Pomeranian are also popular, the Chihuahua's enduring popularity makes it the most common toy dog breed.