Biologist Kathryn Lord and her team at the University of Massachusetts may have discovered the reason for the difference between dogs and wolves, according to Discovery News.
It starts with the way they enter the world.
Wolf pups begin walking around and exploring their environment at two weeks old while they are still blind and deaf. They rely mostly on scent. When they start to hear, they are frightened by the sounds. When they start to see, they are frightened by the sights.
At the age of two weeks, puppies are just blobs. They don’t walk and start to explore the world until they have hearing and sight, around the fourth week. Since they don’t experience the sensory shock that wolf cubs do, they love exploring and seeking new stimuli with no fear.
Through thousands of years of being protected by humans, dogs get a more gentle start in life without danger of predators and other threats.
Through those same thousands of years, wolf cubs have experienced fear from their own developing sight and sound.
This may explain why dogs are easily socialized at a very young age while a wolf never gets over those early fears.