Depends on what you mean by how long?
If you mean how much time do they spend playing in a day....quite a bit. They'll play for awhile, then rest, then go back to play...on and off all day. Mine is quite happy just to bat her squeaky ball around or wrestle with one of her squeaky toys.
If you mean how long...as in do they still play when they reach adulthood...yes, mine is 5 years old and still plays and runs like she did when she was a puppy.
if the chihuahuas are nice they can play with the cat. one time i had two chihuahuas and a cat and they played together. (im not sure what you ment when you say "Did chihuahuas can stay",sorry)
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.
15 years
72 inches
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