#4 Chihuahuas are descendants of the techichi, who were also pocket dogs.
#5 In 2014, a flock of Chihuahuas caught up with horror in a town in Arizona
Small dogs huddled in flocks and chased local kids, bullied big dogs, shit everywhere, and behaved very badly. The residents of the town received about 6,000 complaints to the relevant authorities before the problem was resolved.