A long time ago I had an idea that earthquakes could be predicted in Los Angeles by having recorders around the city, to keep track of how many dogs are barking. If dogs in a particular place bark, it doesn't mean anything. But if dogs all over the Los Angeles area start barking at the same time, it might predict an earthquake.
Now I find a Chinese city is using dogs to predict earthquakes :)
Not apparently by analyzing dispersed dogs, although that might work better :)
Why are the Chinese able to do with dogs what we here in the US of A are unable to do with zillions of taxpayer dollars?
They are earning the right to rule.
A few years ago my Great Dane/German Shepherd started barking furiously in the middle of the night. A minute or two after he started, we felt an earthquake—not uncommon here in southern California. That minute might be useful in getting going to a safer spot, but as a practical method of predicting earthquakes and setting off warning alarms, it does not seem useful.
In vehicle-packed SoCal and in people-packed China, "useful" is defined as a week in advance; "fittest to survive" as those who leave immediately.
As described in the link, dogs do know about earthquakes far enough in advance sometimes, to be useful. Apparently a 90,000-person town in China was evacuated on the basis of dog behavior, a few hours before a 7.3 magnitude earthquake.
The link above was messed up, I've fixed it this time.