4. Golden Retriever
The Golden Retriever is one of the most popular dog breeds when families are looking to add a dog member of the family. However, many are used as working dogs as well. They take their work seriously and work thoroughly but are also known for the gentleness. They will not damage anything they grasp in their mouths.
3. German Shepherd
The German Shepherd is most commonly known as a police or military dog breed. These dogs have an incredibly strong bite and pick up new commands as the drop of a hat. Additionally, they have an incredible endurance and are able to stay focused for hours. They are often considered to be one of the top most intelligent dog breeds in the world.