Chihuahua’s have a long life span of about 10 to 18 years and this can be the smallest dog although they vary in size. On average they are 6 to 9 inches tall and only 3 to 6 pounds. They make great companion dogs and they love to cuddle. This breed is unique in that it is an excellent watch dog and can be trained easier than other small dogs. They are usually very smart. They have big personalities and love to run and play. They are going to follow you around the house and make excellent companions on errands and traveling. They forget how small they are and it’s important that you be very careful with them around big dogs. It’s important that you check the health credentials of your breeder. You also must socialize your chihuahua with small children if there will be any around your house. It is possible that this breed comes from the ancient spiritual Toltec society and were revered as mystical healing creatures by the Aztecs.