The difference between a pear-headed Chihuahua and an apple-headed Chihuahua is the shape of the skull. An apple-headed Chihuahua has a round, domed skull resembling an apple. The pear-headed, or deer, shape is flatter on top with a longer muzzle, resembling a pear more than an apple.Know More
According to the American Chihuahua Breed Club's official standard, the correct look for a Chihuahua is always the "apple head." The head of the dog should be a domed round shape. Geneticists believe that the apple shape is a result of a combination of mutations causing brachycephalus and hydrocephalus. Brachycephaly is a malformation of the skull that causes it to be "squashed" in front, leading to a shortened muzzle. Hydrocephalus is an excessive amount of fluid around the brain, which can cause serious health problems. The deer shape appears to be somewhat brachycephalic, but is lacking the hydrocephalus-related dome. Pear-headed dogs suffer from fewer health problems and may be easier to obedience train, perhaps because they do not have hydrocephalus.
According to the American Chihuahua Breed Club, many Chihuahuas do suffer from health problems related to hydrocephalus. Symptoms of obstructive hydrocephalus include sleepiness, aggression, difficulty in housetraining, altered gait and, in extreme cases, seizures. However, if the Chihuahua has non-obstructive hydrocephalus there may be no apparent clinical signs.Learn more about Dogs
A Chihuahua and poodle mix is commonly called a chipoo (or chi-poo), but might also be called a wapoo, choodle, poochi or fiesta poo. A chipoo is a designer dog that originated in the United States.Full Answer >
A merle Chihuahua is a Chihuahua with a dappled coat. Merle is a coat pattern found in many domestic dog breeds; it consists of darker blotches of color on a lighter background of the same hue.Full Answer >
A blue Chihuahua is a very rare and prized type of Chihuahua whose gray-blue color is the result of a recessive gene that causes the color of a black Chihuahua to become diluted. The recessive trait must be possessed by both parents to produce this type of Chihuahua.Full Answer >
The breed that a Chihuahua is mixed with is unknown. There are many ideas as to the origin of the breed, but there is no proof that any are true.Full Answer >