The Labrador Retriever is a breed of domesticated dog, originating from the Labrador province of Canada, on Earth. Labrador Retrievers come 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")