At seven weeks of age, a healthy Labrador retriever puppy's weight is generally between 12 and 14 pounds. According to GottaLoveALab.com, a Lab puppy should weigh 2 pounds for each week of its age. This is a solid measure to gauge weight up until the puppy is 10 months old.
Female Labs are generally smaller than males, and a lower weight is acceptable. If a puppy gains more than 2 pounds a week, GottaLoveALab.com suggests a reduction in food. However, Labrador retrievers grow at amazing rates, and their nutrition needs are high. High-quality puppy foods are recommended in the dog's first year of life.