The famous fox domestication experiment that was carried out successfully in Russia over 40 years [1], shows how many generations it takes (40) and what genetic changes occur during domestication.
What I also want to add is that some dog breeders in the late 19th century thought that introducing wolf genes into dog breeds would make better dogs. They ended up creating horrible dog breeds (that still exist) that have the shyness, anxiety, and distrust of wolves.
What I also want to add is that some dog breeders in the late 19th century thought that introducing wolf genes into dog breeds would make better dogs. They ended up creating horrible dog breeds (that still exist) that have the shyness, anxiety, and distrust of wolves.
1: https://en.wikipedia.org/wiki/Domesticated_silver_fox