alt Hacker NewsNot sure man. The closest relative to the dog is the likely extinct, Japanese Wolf https://en.wikipedia.org/wiki/Japanese_wolf
Maybe they were very tame to begin with? Like the extinct Falkland wolf:
https://en.wikipedia.org/wiki/Falkland_Islands_wolf
"There were no forests for the animal to hide in, and it had no fear of humans;[citation needed] it was possible to lure the animal with a chunk of meat held in one hand, and kill it with a knife held in the other"
Someone once tried to hire me, on one of the islands up the Northern coast of BC.
Took 3 hours to get to by ferry, and one of the enticements was that "we have these dwarf deer, and they have no fear of man. You just walk up to them and hit them on the head with a stick".
I presume there was nothing larger than a fox on that island, for a deer to have no fear.