When Do Labrador Retrievers Stop Growing?
Labrador Retrievers typically stop growing in height and length by around 12 to 18 months, but their bodies continue to fill out and gain muscle mass until they’re about 2 years old. While every dog develops at its own pace, most Labs will reach their full physical maturity by the time they hit their second birthday.
Growth Timeline for Labrador Retrievers
Understanding the stages of growth helps owners plan proper nutrition, training, and exercise. Here’s a breakdown of the key phases:
Birth to 8 Weeks: The Neonatal and Transitional Period
In their first few weeks, lab puppies go through rapid development. They’re growing in size, opening their eyes, and beginning to walk. This period is crucial for maternal bonding and early neurological stimulation.
2 to 6 Months: The Puppy Growth Spurt
This is the fastest-growing phase for a Lab. By six months, many Labradors have already reached about 60–70% of their adult height. During this stage, they can gain as much as 2–4 pounds per week. Their limbs often look long and gangly—this is completely normal.
Wondering when your Lab will start to calm down? Behavioral maturity doesn’t usually align with physical growth and can take longer.
6 to 12 Months: Slowing Down, But Still Growing
Labs continue to grow steadily, though not as rapidly. At this point, most have reached their full height, but they’re not done maturing. Expect your dog to look lean and lanky with lots of energy to spare. Males may be around 65–80 pounds, and females typically range from 55–70 pounds.
12 to 24 Months: Filling Out and Final Maturity
By the time your Lab is one year old, it’s usually as tall as it’s going to get. But there’s still a lot happening internally. Over the next several months, Labs develop broader chests, thicker necks, and more muscle mass. This is the period when they “fill out,” reaching their full adult weight and shape.
Factors That Influence a Labrador's Growth
Genetics
Some Labs come from working-line parents, which tend to be leaner and more athletic. Others come from show-line lineage, which often results in a blockier build. Genetics influence not just size but also bone structure, metabolism, and weight distribution.
Nutrition
Feeding a high-quality, balanced diet from the start supports healthy growth. Overfeeding or feeding too much protein too early can lead to joint issues, especially in large breeds like Labs. It’s best to follow a large-breed puppy feeding plan.
Neutering
Early spaying or neutering can slightly delay the closure of growth plates, which might result in a taller dog. While the difference isn’t huge, it’s something to discuss with your veterinarian when deciding the best time for surgery.
Exercise
Too much strenuous exercise during the early months can stress growing joints. It’s important to strike a balance—consistent walks and controlled play are ideal, while intense jumping or running on hard surfaces should be minimized.
Signs Your Labrador Has Finished Growing
Height hasn’t changed for several months
Weight gain slows or stabilizes
The chest appears broader and more filled out
Play and energy levels are more manageable
If you’re still unsure, your vet can examine bone development to determine if growth plates have closed.
Frequently Asked Question(s)
Do male and female Labradors grow at the same rate?
Both genders follow a similar timeline, but males typically grow slightly larger and heavier than females.
What’s the average full-grown size of a Lab?
Most adult males weigh between 65–80 pounds and stand around 22.5–24.5 inches tall. Females usually weigh 55–70 pounds and stand 21.5–23.5 inches tall.
Can I tell how big my Labrador will be as an adult?
Looking at the parents is usually the best indicator. Paw size and growth charts can offer a rough estimate, but there’s always a bit of unpredictability.
Should I worry if my Labrador is smaller than expected?
Not necessarily. Just like humans, dogs grow at different rates. However, if your pup seems underweight, lethargic, or isn’t meeting expected milestones, consult a vet.