Courtesy of Josh Peck of the Chihuahua Home Page, we have used one of his creative sections about the Chihuahua. Almost all the information presented is made up i.e. fiction. You should visit the Chihuahua Home Page for a lot more interesting data.
Some information about Chihuahua's has recently been uncovered. . .
The Chihuahua is an ancient breed which is believed to have its
origins in the late Paleozoic period. The Chihuahua's a earliest
known ancestor, cannis raptor rodentis (meaning: killer dog-mouse)
scoured the almost uninhabitable deserts of what is now Mexico and
the southern United States. Millions of years of evolution allowed
this cannine species to thrive on the arid plain while other dog
species, such as the cannis wimpor frenchus (desert poodle)
struggled for survival, eventually becoming extinct. The early
Chihuahua's oversized, specially adapted ears, acted as water
gathering surfaces. Collecting moisture from the air via its giant
ears, this remarkable animal was able to absorb the condensate
through the skin, allowing it to go weeks without actually drinking
water.
The Chihuahuas ancestor's large ears also served as heat transfer
and shading devices. Using their ears as parasols during the day,
elder cannis raptor rodenti could take turns shading pups from the
harsh desert sun. At night, the animals could cover their tiny brood
with their humongous ears to keep them warm. Along with an acute
sense of hearing which allowed the animals to detect prey and danger
for up to 5 miles away, some scientists speculate that early
Chihuahuas were equipped with bat-like sonar. By emitting high
frequency squeals and yelps and acquiring the reflected signal with
it's large ears, the dog might have been able to home in on
subsurface or nocturnal prey. There is an ongoing debate in the
bioacoustic community as to whether this theory is feasible.
The fossil record indicates that the animals were extremely social
and lived and hunted in packs. Canthropologists (scientists who
study the origins of dogs) theorize that the creatures were highly
intelligent problem solvers and that while feeding mostly on carrion
and large insects, the canines had the capacity to bring down much
more formidable prey; such as desert cats, coyotes and even wolves!
One can only imagine the horrible cries of an ancient big cat being
torn limb from limb, subsequently being eaten alive by these
survivors of the sand.