The difference between the Longhaired Chihuahua and the Butterfly Dog is that the head of the Longhaired Chihuahua is apple shaped, while the Butterfly Dog has a smaller head with a medium width skull. The eyes of the Longhaired Chihuahua are large and round with a dark brown color, while the eyes of the Butterfly are a dull brown with a kernel shape. The ears of the Longhair Chihuahua and the Butterfly are both vertical, with the Chihuahua’s ears being large and erect when tense, and the Butterfly’s ears having an appropriate length of pendulous hair at the tips. The coat of the Longhaired Chihuahua is soft and flat, long and curly; the coat of the Butterfly Dog is shiny and silky long. The tail of the Longhaired Chihuahua has a medium length tail that is carried up or outward, while the Butterfly Dog has a high tail.
