Canids(dogs, foxes,wolves) rarely sleep more than an hour or two at a time. They nap for periods then awaken for a period of activity, then rest again..As pack hunters, they need to be ready for the chase at a moments notice, and to sleep for long periods could be detrimental to the pack's survival. Foxes, usually lone hunters, also nap for brief periods.
There are both long-haired and short-haired chihuahuas, so both.
Most all chihuahuas bark to much.
Some of them are the normal chihuahuas you see everywhere and the others are long haired chihuahuas.
Mexico.
72 inches
15 years
it does not make a difference if they are long haired
Yes as long as you socialize them when they are puppies.
4 to 6 inches if that long
10-12pounds
about 15 years
Chihuahuas come in both short hair and long hair versions. There is no way to determine which one it will be except for raising the chance for a short hair or long hair by breeding two of that type.