labrador retriever

German shepherd dogs, black Russian terriers, Rotti dogs, ... are among the smartest dogs in the dog family.

Smart and loyal dogs, everyone knows. But hardly anyone knows that Border Collie is the smartest dog in the world.

After the mother duck died of the accused eating meat, duckling Dennis was very caring by a Labrador retriever. At that time, Dennis was less than a week old and the 4-year-old