The Labrador Retriever was a breed of domesticated dog, originating from the Labrador province of Canada, on Earth. Labrador Retrievers came in three primary fur colors: black, brown, and sandy yellow, called black labs, chocolate labs, and yellow labs, respectively.
A litter of Labrador Retrievers was kept at the nursery aboard the USS Enterprise-D at the beginning of the year 2365. Ian Troi was very fond of the little dogs and asked Captain Jean-Luc Picard if he had ever played with puppies. (TNG: "The Child")