Millie, the youngest dog
According to the Guinness World Records, the world's smallest dog is a dog named Millie. In 2013, Millie officially entered the Guinness World Records. At that time, he was only 3.8 inches tall and weighed nearly a kilogram. Moreover, when he was born, he was so small that she could even stand on a teaspoon. It turns out that taking care of Millie is a full-time job. Because of her small size, such a small dog can easily disappear. Although Millie is very small, she is a lovely and bold dog.