The trusty and loyal Labrador retriever is the most popular breeds of dog in the United States and the United Kingdom. This friendly companion and useful hardworking dog originally came from Newfoundland. Labs were once used by fisherman to help round up stray fish and pull in nets. Later, breeders bred them to help hunters retrieve game. The Lab's gentle, people-pleasing personality makes it excellent for therapy, search-and-rescue and families.