Thousands of breeds of dogs exist in the world. From the Rottweiler to the poodle, each have their own unique characteristics. Some people may like grand, strong K-9's, while others may pick dainty, petite dogs as their passion. There is even a breed of dogs for people who love tacos: . The demand is growing for this cuddly creature. is a tiny dog whose history, health, habits, and personality combine to make it the special pet that is so popular today. The origins of the chi are not certain, but a few theories give a good idea. Many believ ....