A toy dog breed is a very small dog breed or just a smaller than normal version of any dog breed. Fur example, the Chihuahua is always a small pup, but some breeds such as the Poodle has three diffurent sizes, which are the Toy, Miniature, and Standard. Toy breeds are typically under 12 inches tall and usually weigh less than 15 pounds. There are many reasons why toy breeds are so pawpular, such as how easy it is to transport them. In fact, most of them will fit in a purse or backpack. They are also great lap dogs and are very alert, so they will almost always let you know when someone or something new is around. Here are the top 10 toy dog breeds we found.