A black Lab is a Labrador Retriever in the breed's original color, not a separate breed. Labs descend from Newfoundland's St. John's water dogs and were refined in Britain as gun dogs, which explains the dense, water-resistant double coat, the otter tail and the love of retrieving. Adults usually weigh 55 to 80 pounds, and some have a small white spot on the chest.
Color doesn't set personality. Black Labs tend to be friendly, food-motivated and eager to please, though field-bred dogs are often leaner and more driven than show-bred ones, and each dog varies. In West Chester, that means a dog that enjoys meeting people on downtown sidewalks, needs steady leash training, and sheds enough that weekly brushing becomes routine. Labs also mature slowly, so expect a bouncy adolescence.