My two are very similar (they are related after all!) and they are the calmest dogs you could meet, my male is the social outgoing one ( I take him everywhere) and the female is my husbands dog and she's very quiet and shy and likes to observe new people in our home.
When it comes to dogs, the female avoids and dislikes ANY dog that is not a Chihuahua, we can be walking down the street and she will just AVOID.. ha ha Bijou does not care so much, he'll stop and sniff and check a new dog out.
Its weird my dogs can spot another Chi before I can.
In our home?? omg forget about it! We had a larger breed puppy with us for a few weeks and they were abysmal! little tyrants! one would guard her food bowl and not let her near it.. the other one would hide under the china cabinet and dart out attacking her legs as she trotted by..
I should not laugh but it was really funny to watch them be such little ***ts! Bijou even tried to bite her face! I have never seen anything like it, but when the other Chihuahua's come over? it's like a Mexican fiesta! they all hang around groom each other.. and prance around in a pack. My dogs also seem to like cats, not sure if that's chihuahua specific though.
Chihuahua's are nutty little dogs.