- The breed is believed to have ancestors from the companion dogs of ancient civilizations in Mexico, such as the Aztecs.
- Chihuahuas are known for their small size. There are two varieties of Chihuahua: short-haired and long-haired.
- Short-haired Chihuahuas have a short, smooth coat, while long-haired Chihuahuas have a softer, longer coat.
- The average size of an adult Chihuahua generally varies between 15 and 23 cm at the withers and its weight can vary from 1 to 3 kg.
- Despite their small size, Chihuahuas are often very courageous and can be protective of their family. They are often attached to their owner and can be wary of strangers.