There are two distinctive types of chihuahua: apple head chihuahuas and deer head chihuahuas. The one in the photo above is a deer head chihuahua- her head is more slender and less round. Her name is Yoko.
The chihuahua in the photo above is an example of an apple head, his head is more rounded and his snout is shorter. His name is Valentino.
There are also two types of coats when it comes to chihuahuas: long hair and smooth coat. Valentino is a long haired chihuahua, while Yoko has a smooth coat.
Chihuahuas usually weigh less than 6 lbs and their life expetancies are long- some as long as 18 years! They are great for people who live in the city, and for those who live a more peaceful and calm life. They are called lap dogs for a reason!
Learn more about chihuahuas here!