4) Yorkshire Terrier
In the 19th century, England developed this superb dog breed for a purpose to kill mice in the textile mills. Yorkshire are among the lifelong tiny puppies that found in most of the houses in the world. Usually known that small sized dogs are very playful breeds, but Yorkshire terrier is a lover of comfort and enjoys cuddling on laps or snuggling into soft pillows. As disposition, they are inquisitive, very active and overprotective, but, also often aggressive, unlike the above dog breeds.