The Chihuahua is unique in that it is considered the smallest purebred in the world. Born weighing only an ounce or two, Chi puppies often weigh less than eleven ounces by the time they are weaned and ready to go to a new home. Fitting comfortably in the palms of your cupped hands, but every bit a dog with brains and moxie, the Chihuahua puppy is the pup with the biggest “Awww” factor.