I was owned by one of these characters for about 16 years.
The toughest retriever traits combined with a German Shepard attitude.
Protective of family.....not friendly toward strangers.

When I first laid eyes on him, I thought wow, that's a huntin' dog.




Edit:
In James Michener's "Chesapeake" read "The Watermen" for a wonderful story about a Labrador, a Chesapeake and their owner.