There are many different versions of the origin of these dogs. Some say that they are the ancestors of ancient Mexican wolves.
There is a version that they descended from African foxes because they are very similar to Chihuahuas in the size and shape of the ears. It is also believed that the homeland of the Chihuahua is Egypt. But the main version says that these dogs originated long before our era, about 1500 years.
If you are going on a long journey, such as vacation, you are better off taking your pet with you. Moreover, its compact size allows it.