A black Lab is the Labrador Retriever in its original and most familiar color, not a separate breed. The breed descends from the St. John's water dogs of Newfoundland and was refined by British sportsmen into gun dogs. Black Labs have a broad head, an otter tail, a dense water-resistant double coat and an athletic frame, usually 55 to 80 pounds, sometimes with a small white chest spot.
Color doesn't change personality, so a black Lab tends to be as friendly, food-motivated and eager to please as any other Lab, though dogs vary. Field-bred dogs are often leaner and more driven than show-bred ones. In Lexington, expect a dog that needs daily exercise, consistent training, measured meals and plenty of brushing during shedding season, and that matures slowly through a bouncy adolescence.