The smallest dog breed is Yorkie or Yorkshire Terrier. However, please note that Yorkshire Terrier is not the smallest breed of dog in terms of weight and height. The chihuahua is considered the smallest breed of dogs which can weigh from .05 to 2.5 kilograms. However, if we are going to follow the Guinness World.
Record’s list of the smallest dog, then we can truly answer letter B since Lucy, a Yorkshire Terrier from New Jersey, holds that record. She weighs 2 ½ pounds or approximately 1.13 kilograms. She is a therapy dog – making rounds, visiting nursing homes, hospitals and rehabilitation centers and works with children with disabilities – of Leashes of Love, a company based in Cherry Hill, New Jersey.