Originally bred to help fishermen in Newfoundland, Labrador retrievers helped pull in the fishnets and retrieve escaped fish. Later, they were bred with other retrievers, spaniels and setters and became well-known as a strong, athletic hunting and retrieving dogs. The Lab's personality is calm and stable, and while still a good hunting dog, these animals are well-suited for families.
Gender Makes a Difference
Depending on gender, a full-grown Labrador retriever weighs in at 55 to 70 pounds for a female who should be 21½ to 23½ inches tall at her withers, and 65 to 80 pounds for a male who should stand 22½ to 24½ inches tall at his withers. These are the standard weights for full-grown working dogs and don't apply to puppies younger than a year old.