Because Chihuahuas are small dogs they make great apartment dogs, however they do not do well with small children.

Because of the Chihuahua delicate constitution, they are purely indoor dogs; prolonged exposure to the outside will make them ill.

Because these dogs are so tiny it is not wise to leave them outdoors unsupervised, these dogs can become prey to larger animals such as coyotes.

Did you know that Chihuahuas come in two different coats, the dominant smooth short coat and a long haired coat that can be flat or curly?

Did you know that a Chihuahua puppy by the name of Heart-Kun was born in Japan with the actual pattern of a heart on his coat? The little Chihuahua made television news and has captured the hearts of people worldwide.

Many Chihuahuas have difficulty in birthing because the puppies' heads are too large for the birth canal. Many Chihuahua dames need immediate caesarian delivery or even die from birthing (whelping).

The world's smallest police dog is a 7-pound Chihuahua, Rat Terrier mix called Midge. She is training as a drug sniffer police dog.

Even though Chihuahuas are tiny dogs they have no fear of larger animals. If not kept on a leash, they will run after them and attack. The problem is the tiny Chihuahua can get seriously hurt.

Did you know that Chihuahuas can be born with a molera, a soft spot on the skull, similar to the fontanel in human babies? The molera also hardens with age just like a human.

Chihuahuas are fragile dogs and can break their bones very easily. Even jumping from a chair can cause hip displacement. Chihuahuas often suffer from patellar luxation, knee displacement, ulcers on the eyes (corneal dystrophy), heart problems, liver shunts, hypoglycemia and other genetic disorders.

Some Chihuahuas can make amusing trilling sounds when they want to communicate with humans. Some people call it a cross between a bird and a squirrel sound.