"When females were selecting mates, they also had to select males that had a similar tameness to themselves," study co-author Alex Capaldi, a mathematician and statistician at James Madison University in Virginia, told Live Science. "So if both of those processes are in play, then it is possible for the self-domestication hypothesis to beat the time constraint critique."

"Snax and chill."

The genomic signature of dog domestication reveals adaptation to a starch-rich diet | Nature