It was a mystery.
【Pic1】

Kona barking at a dog when she saw it.
【Pic2】

Kona not barking when seeing the same dog.
Why???
Our trainer, Masumi-san, gave me her psychological explanation of Kona’s behavior.
In pic1, the dog was walking ahead of the person.
In pic2, the same dog was walking behind the person. In other words the dog was in a submissive position relative to its owner. The fear Kona felt differed depending on the other dog’s mentality or posture.
When Kona saw dogs walking ahead of humans or pulling humans, she felt much more fear and tended to become aggressive in self-defense.
Before, when I saw other dogs walk toward us, I just casually glanced at them. But after I learned Kona’s psychological reaction, I started to observe people and their dogs more carefully to try to assess their state of mind and how that would affect Kona.

To put it another way, if Kona walks submissively behind me, it lessens the fear other dogs feel from Kona, which means it lessens the chance of other dogs barking at Kona. This way of walking has many advantages!
Japanese