California is overflowing with homeless Chihuahuas. As reported by the LA Times and other sources, shelters in California have more Chihuahuas than they know what to do with. This is not really the case in other parts of the US. In fact, many of these Chihuahuas have been sent of different regions where demand is high and little dogs are few.
What caused the overabundance? It was probably a combination of several things. First of all, Chihuahuas have been among the most popular of all dog breeds for several years. Secondly, certain celebs have made these "purse dogs" look like the hottest thing in fashion. The film Beverly Hills Chihuahua probably didn't help this situation either.
No matter what the reason for the surge in popularity, the reason they are all homeless probably comes down to two things: 1) The economy, and 2) people got in over their heads. Though they are adorable and wonderful dogs, Chihuahuas are not right for everyone. They are tiny and fragile in physique, but tough and stubborn in personality. They do not always play well with others - especially children, and especially without proper training. Yes, Chihuahuas need more than to be carried around in little pink bags. They need training, socialization and everything else all dogs need. Give them these things, and you can end up with quite an amazing dog.
http://dogs.about.com/b/2009/12/10/the-chihuahua-boom.htm?nl=1