1. Cairn Terrier – 88.7%
Taking the number one spot as the most beautiful dog in the world according to science is the Cairn Terrier. Best known as Toto from The Wizard of Oz, this breed boasts an expressive face with near-perfect proportions. Its well-defined eyes, compact muzzle, and symmetrical head structure align closely with the golden ratio, giving it an impressive 88.7% rating. Cairn Terriers are cheerful, alert, and highly adaptable, making them wonderful pets. Their shaggy yet well-balanced appearance only enhances their natural beauty, making them stand out in a crowd. With a history as a skilled hunting dog, the Cairn Terrier combines intelligence with charm, proving that science and nature agree on its undeniable attractiveness.