All about Chihuahua
The Chihuahua is a tiny toy sized dog. The body is longer than it is
tall. The head is well-rounded, apple in shape and the muzzle is short
and pointed with a well-defined stop. Puppies have a soft spot on the
top of the skull called a "molera," which usually closes by adulthood.
The large, round eyes are set well apart and are dark, ruby, and may be
lighter in white dogs. Eye color varies and are often dark, but the
merle gene can produce a dog with blue eyes.
The erect ears are large. Dewclaws may be removed. The tail is long,
sickle-shaped and either curled over the back or to the side. The coat
can be short, long and wavy or flat. All colors, both solid, marked or
splashed are accepted. Colors include, but are not limited to, black,
white, chestnut, fawn, sand, silver, sable, steel blue, black & tan
and parti-color.
The origin of chihuahua dogs is mexico , this is the oldest breed on the American continent and the smallest
breed in the world. Native to Mexico, where it received its name from
the Mexican State of Chihuahua. It was only brought to Europe at the end
of the nineteenth century. The breeds that were used to make up the
Chihuahua are unclear, but some think it originated from the Fennec Fox.
The dogs were sacred to Pre-Columbian Indian nations and were also
popular pets to the upper class. The dogs are prized for their size and
are most valued to some fanciers when they weigh under 2-1/4 pounds (1.3
kg).
Prone to rheumatism, slipped stifle, colds and gum problems. Also corneal dryness and secondary glaucoma, due to their protruding eyes. Gains weight easily. Take caution around toxic products such as chocolate or fertilizer. This is a very small breed and it will not take much to poison them. Chihuahuas are often born via cesarean section because puppies are born with relatively large heads. Susceptible to fractures and other accidents in puppyhood. Some Chihuahuas have a molera, an unclosed section of the skull which can remain open throughout life. This makes the dog prone to injury. Has a tendency to wheeze and snore because of their small, short muzzles. Prone to stress, caused by the owners tendency to treat them like little babies. All dogs, even tiny ones, need to feel their owners are strong-minded beings able to handle the entire pack.
They are good little dogs for apartment life. The Chihuahua likes warm weather and dislikes the cold. They need space just like any other dog. Because they are small does not mean they can be kept in a very small area.
Chihuahuas are more prone to injury resulting from their tiny size, rather than to illness or disease. So whether a Chihuahua lives a long life or not is more dependent on how careful you are to keep them safe. But Chihuahuas are very prone to loose knee joints (which can require expensive surgery) and to dental disease (their mouth is too small to provide firm footing for healthy teeth).
Origin

THE Chihuahua have many Health Problems
Prone to rheumatism, slipped stifle, colds and gum problems. Also corneal dryness and secondary glaucoma, due to their protruding eyes. Gains weight easily. Take caution around toxic products such as chocolate or fertilizer. This is a very small breed and it will not take much to poison them. Chihuahuas are often born via cesarean section because puppies are born with relatively large heads. Susceptible to fractures and other accidents in puppyhood. Some Chihuahuas have a molera, an unclosed section of the skull which can remain open throughout life. This makes the dog prone to injury. Has a tendency to wheeze and snore because of their small, short muzzles. Prone to stress, caused by the owners tendency to treat them like little babies. All dogs, even tiny ones, need to feel their owners are strong-minded beings able to handle the entire pack.
Living Conditions
They are good little dogs for apartment life. The Chihuahua likes warm weather and dislikes the cold. They need space just like any other dog. Because they are small does not mean they can be kept in a very small area.
Chihuahuas are more prone to injury resulting from their tiny size, rather than to illness or disease. So whether a Chihuahua lives a long life or not is more dependent on how careful you are to keep them safe. But Chihuahuas are very prone to loose knee joints (which can require expensive surgery) and to dental disease (their mouth is too small to provide firm footing for healthy teeth).