Chihuahua Information
Small in size, huge in personality. One of the most recognizable dog breeds, the Chihuahua is known for its alert, pointy ears, saucer-sized eyes, and sassy spirit. Their fur comes in many different colors with different markings and can be long or short. The breed is highly intelligent.
While the dog is playful, he doesn't need much exercise and prefers staying indoors. Because of this, the Chihuahua is a good choice for those with limited space. When he goes outside, be sure to limit his time in cold weather. With their large personality, they need some training to keep them in check with who's the boss. Don't worry; a little training goes a long way with this super intelligent breed.
History
The Chihuahua has origins in Mexico, where it likely descended from the Techichi, a companion dog from the Toltec civilization. Similar dogs are painted on burial pots in Mayan cultures, including the Great Pyramid of Cholula and Chichen Itza.
The current breed has been bred with European dogs, changing it from its Mexican origins. The name comes from the Mexican state of Chihuahua, where Conquistadores found many similar small dogs.
Chihuahua Training & Temperament
Chihuahuas are intelligent little dogs who can do well in training. They have some attitude and can expect to get their way at times, but will want to please humans who are in charge.

Chihuahua Exercise
The Chihuahua doesn't require too much exercise. Their size also means they're easy to exercise just walking around the house or chasing a ball in a small area. They also enjoy short walks. Just be cautious; if they get too tired, you may need to carry them home. Also, make sure to keep them warm if exposed to the cold.
Chihuahua Grooming
There are two coat variations, a long and a short. The short-haired variety needs little care other than bathing. The longer-haired version should be brushed. Make sure to keep your dog's ears & teeth cleaned to avoid buildup.
Chihuahua Health
A well-bred Chihuahua should be a pretty healthy pup. Possible health issues include heart problems and eye disease. Dental treats and brushing are essential for their tiny teeth.
Sources: https://en.wikipedia.org/wiki/Chihuahua_(dog), https://www.akc.org/dog-breeds/chihuahua/