FAQ ~~~

Are they good with children?

Generally, no. Be careful when walking your Chihuahua to keep your Chi well away from toddlers and young children, who are often uninhibited and will approach your dog.
Again, this is general good advice; some Chihuahuas are friendly around children (usually as a result of de-sensitization). In this case and others, the master's knowledge of his or her Chihuahua and good judgement should prevail.

What are the differences between the smooth coats and the long coats?

The issue of whether or not there is a difference in personality seems to be a topic of debate within the Chihuahua community. Some claim that there is no difference in personality; others swear that longcoats have a tendency to be "soft-tempered" while smoothcoats are more prone to aggressive behaviour. Let's set aside the personality issue and focus on physical and maintenance differences.
Smoothcoats tend to have coats that are much coarser than longcoats -- almost like bristles in some cases. Smoothcoats also shed more than longcoats. However, longcoats can shed as well. Heavily coated longhairs require brushing about once a month, but this can be a pleasureable exercise for both Chi and master rather than a chore.

As far as bathing is concerned, as a general rule, the longcoats will need to be bathed more frequently, and it'll be a longer process (both washing and drying). The bib -- the furry part of the chest -- can easily get dirty and matted. Longcoats can also occasionally get fecal matter stuck on their "pants." You'll have to either bathe your dog or cut the bit off with scissors when this happens.

Some Chihuahua owners swear by long-hairs and wouldn't have anything else; it is as much a matter of personal taste as is coat color.

Are they sociable with other dogs?iable with other dogs

Generally speaking, no.
Chis are very sociable with their own kind. So several Chihuahuas can be quite happy living in the same household. That includes two or more males sharing the same house.

 Do they require special dog food?

No. They have the same nutritional needs as most dogs. I feed mine regular Alpo kibbles, and, although the kibbles are large, my Chihuahua seems to sort of enjoy cracking each one with her jaws.
Chihuahuas prefer several small meals per day, rather than one big meal. I leave a bowl of kibbles out for my Chi and she seems to eat about three small meals a day.