The Labrador Retriever descends from the St. John's water dogs of Newfoundland and was refined into a gun dog in Britain. Black was the color of the earliest Labs and remains genetically dominant. A black Lab is the same breed as a yellow or chocolate one, with a broad head, an otter tail and a dense, water-resistant double coat.
In St. Louis, that coat means heavy shedding in spring and fall and a dog that runs warm through humid summers. Labs are typically friendly, food-motivated and eager to please, though field-bred dogs run leaner and more driven than show-bred ones, and every dog differs. Plan on daily exercise, consistent training, measured meals and regular brushing. Adolescence is bouncy and can last into the second or third year.