Chihuahua: The Chihuahua is one of the smallest breeds of dog, and is named after the Mexican state of Chihuahua.Current
breed standards defined by registries specify an "apple-head" or
"apple-dome" skull conformation.Chihuahuas have large,round eyes and
large, erect ears, set in a high, dramatically rounded skull.Chihuahuas are loyal, friendly and good family pets when treated respectfully. They can get all the exercise needed in the house or apartment.There is a study by neuropsychologist and professor of psychology, Stanley Cohen, that says Chihuahuas are classified as fair or below average for working/obedience dog intelligence.
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