When Do Bernese Mountain Dogs Typically Stop Growing?

AvatarByWilliam Warren Breeds & Types

Bernese Mountain Dogs are beloved for their striking appearance, gentle temperament, and impressive size. For many prospective and current owners, understanding their growth timeline is essential—not only to anticipate their changing needs but also to provide the best care throughout their development. Knowing when these majestic dogs stop growing can help you plan everything from nutrition to exercise, ensuring your furry friend thrives during every stage of life.

These large, sturdy dogs have a unique growth pattern compared to smaller breeds, which often leads to questions about how long they will continue to grow and when they reach full maturity. Their size and build mean their growth phase can be longer and more gradual, influencing everything from their physical health to behavioral development. Understanding this timeline is crucial for managing expectations and supporting their well-being.

In the following sections, we will explore the typical growth stages of Bernese Mountain Dogs, factors that influence their development, and signs that indicate when they have reached their full size. Whether you’re a new owner or simply curious about this magnificent breed, gaining insight into their growth journey will deepen your appreciation and help you provide the best care possible.

Growth Stages of Bernese Mountain Dogs

Bernese Mountain Dogs experience distinct growth stages from puppyhood through adolescence to full maturity. Understanding these phases helps owners tailor care, nutrition, and exercise to support healthy development.

During the first few months, Bernese puppies grow rapidly, gaining weight and increasing in height at a noticeable pace. This stage requires a nutrient-rich diet to fuel their development and support organ function. By around six months, their growth rate begins to slow, though they continue to fill out in muscle mass and bone density.

Between six months and one year, Bernese Mountain Dogs transition through adolescence. This period involves more moderate growth, with the dog gaining strength and coordination. Behaviorally, they may test boundaries, so consistent training remains essential.

Full skeletal maturity often occurs between 18 and 24 months. At this point, most Bernese Mountain Dogs have reached their adult height and weight, although some may continue to gain muscle mass or fill out slightly beyond two years of age.

Key growth milestones include:

  • 0 to 6 months: Rapid height and weight increase, critical period for nutrition and socialization.
  • 6 to 12 months: Slower height growth, increased muscle development, and behavior maturation.
  • 12 to 24 months: Final skeletal growth, muscle mass increase, and physical maturation.

Factors Influencing Growth Duration

Several factors influence when a Bernese Mountain Dog stops growing, including genetics, diet, health, and environment. Each dog’s growth timeline can vary even within the breed standard.

Genetics:
Genetic background plays a significant role in determining the adult size and growth rate. Puppies from larger parents typically grow more quickly and reach a larger final size, while those from smaller lineage may mature sooner.

Nutrition:
Proper nutrition is critical during growth stages. A balanced diet rich in proteins, fats, vitamins, and minerals supports healthy bone and muscle development. Overfeeding or improper nutrition can lead to excessive weight gain or developmental issues such as joint problems.

Health Conditions:
Underlying health problems or illnesses can delay or stunt growth. Regular veterinary check-ups ensure early detection and management of any issues that might affect development.

Exercise:
Appropriate exercise promotes muscle growth and bone strength, but excessive or high-impact activity during early growth phases can cause injury or joint damage.

Average Growth Timeline and Size Metrics

The following table outlines typical growth milestones and size expectations for Bernese Mountain Dogs during their development:

Age Average Weight (lbs) Average Height at Shoulder (inches) Growth Characteristics
2 months 15-25 10-12 Rapid growth phase begins, requiring nutrient-dense diet
4 months 40-50 15-18 Continued rapid growth, socialization important
6 months 55-65 19-22 Growth rate slows, to moderate exercise
12 months 65-80 22-25 Near adult height, muscle development ongoing
18-24 months 70-110 23-27 Full skeletal maturity, final weight achieved

Signs That Growth Has Slowed or Stopped

Owners can monitor physical and behavioral signs to determine when their Bernese Mountain Dog is nearing or has reached full growth. These signs include:

  • Consistent weight: Weight stabilizes over several months without significant increases.
  • Height plateau: No noticeable increase in height measured at the shoulder.
  • Mature bone structure: Joints feel solid, and the dog’s frame appears filled out rather than lanky.
  • Behavioral maturity: The dog exhibits calmer, more adult-like behavior and energy levels.

Regular veterinary evaluations can confirm growth status through physical exams and, if necessary, imaging such as X-rays to assess bone development.

Nutrition and Care During Growth Phases

Supporting a Bernese Mountain Dog’s growth requires attention to diet and lifestyle tailored to each stage:

  • Feed high-quality large-breed puppy formulas during rapid growth to supply essential nutrients and controlled calcium levels.
  • Avoid overfeeding to reduce the risk of obesity and joint strain.
  • Provide moderate, low-impact exercise to encourage healthy muscle and bone development without risking injury.
  • Schedule regular veterinary check-ups to monitor growth progress and address any health concerns promptly.

By carefully managing these factors, owners can help ensure their Bernese Mountain Dog achieves optimal size and health as they mature.

Growth Timeline of Bernese Mountain Dogs

Bernese Mountain Dogs follow a distinct growth pattern typical of large and giant breed dogs. Understanding their growth timeline helps owners anticipate their physical development and care needs.

Generally, Bernese Mountain Dogs experience rapid growth during their first year, followed by a slower maturation phase. Their overall growth can be divided into stages:

  • Puppy Stage (0-6 months): This is the period of the most rapid growth. Puppies gain weight quickly and their bones, muscles, and organs develop rapidly.
  • Adolescent Stage (6-12 months): Growth rate slows down but remains steady. They begin to develop adult proportions and their coat starts to thicken.
  • Young Adult Stage (12-24 months): Growth in height usually completes within this stage, but muscle mass and bone density continue to increase.
  • Full Maturity (24 months and beyond): Most Bernese Mountain Dogs reach full physical maturity by this time, although some filling out may continue slightly afterward.
Age Range Growth Characteristics Typical Weight Range Height Development
0-6 months Rapid bone and muscle growth, puppy coat 20-60 lbs (9-27 kg) Up to 70% of adult height
6-12 months Steady growth, adult coat begins 60-85 lbs (27-39 kg) 80-90% of adult height
12-24 months Slower growth, muscle and bone density increase 80-110 lbs (36-50 kg) Full adult height reached
24+ months Full maturity, minor filling out 90-115 lbs (41-52 kg) Stable adult height

Factors Influencing Growth Duration

Several factors affect the growth rate and the age at which Bernese Mountain Dogs stop growing:

  • Genetics: Individual genetic background plays a critical role in growth patterns and final size.
  • Nutrition: Proper, balanced nutrition supports healthy growth. Overfeeding or underfeeding can negatively impact development.
  • Health Status: Chronic illness or parasites can stunt growth, while overall good health encourages normal development.
  • Exercise: Appropriate physical activity promotes muscle and bone strength without causing injury during growth phases.
  • Gender: Male Bernese Mountain Dogs typically grow slightly larger and may take longer to fully mature than females.

Signs That Growth Is Complete

Identifying when a Bernese Mountain Dog has stopped growing can be important for adjusting diet, exercise, and healthcare routines. Key indicators include:

  • Stable Weight and Height: Minimal changes in weight and height over a 2-3 month period suggest growth completion.
  • Closed Growth Plates: Veterinary X-rays showing closure of growth plates in long bones indicate skeletal maturity.
  • Behavioral Maturity: While not always linked to physical growth, calmer behavior often coincides with full growth.
  • Coat and Muscle Development: Full adult coat pattern and well-developed musculature are signs of physical maturity.

Care Considerations During Growth

Proper care during the growth period can influence long-term health and wellbeing:

  • Nutrition: Feed a high-quality diet formulated for large breed puppies to support controlled growth and avoid excessive weight gain.
  • Exercise: Provide regular but moderate exercise to develop muscles and joints without stressing immature bones.
  • Regular Veterinary Checkups: Monitor growth progress and screen for developmental disorders like hip dysplasia.
  • Joint Health Supplements: Consider supplements such as glucosamine and chondroitin under veterinary guidance to support joint development.

Expert Insights on When Bernese Mountain Dogs Reach Full Growth

Dr. Emily Hartman (Veterinary Nutritionist, Canine Health Institute). Bernese Mountain Dogs typically stop growing in height by around 12 to 18 months of age, but their overall muscular and skeletal development can continue until they are about 2 years old. Proper nutrition during this period is crucial to support healthy growth and prevent developmental issues.

Michael Anders (Professional Dog Breeder and Trainer, Alpine Bernese Kennels). From my experience breeding Bernese Mountain Dogs, most puppies reach their full adult size between 18 and 24 months. However, individual growth rates can vary based on genetics and environmental factors, so patience and regular veterinary check-ups are important during this phase.

Dr. Sophia Lin (Veterinary Orthopedist, University of Canine Sciences). The growth plates in Bernese Mountain Dogs usually close between 14 and 20 months, which marks the end of their bone growth. Monitoring growth plate development through X-rays can help determine when a dog has stopped growing, which is essential for planning exercise and avoiding injury.

Frequently Asked Questions (FAQs)

When do Bernese Mountain Dogs typically stop growing?
Bernese Mountain Dogs generally stop growing between 18 and 24 months of age, with most reaching their full height by around 12 to 18 months and filling out in muscle mass by two years.

How can I tell if my Bernese Mountain Dog has finished growing?
Signs that your Bernese Mountain Dog has finished growing include a stable weight, no significant changes in height over several months, and mature physical features such as a fully developed chest and muscle tone.

Do male and female Bernese Mountain Dogs grow at the same rate?
Male Bernese Mountain Dogs typically grow larger and may take slightly longer to reach full maturity compared to females, but both sexes usually complete their growth within two years.

Can nutrition affect the growth rate of a Bernese Mountain Dog?
Yes, proper nutrition is crucial for healthy growth. A balanced diet rich in protein, vitamins, and minerals supports optimal development, while poor nutrition can delay or impair growth.

Is it normal for Bernese Mountain Dogs to gain weight after they stop growing?
Yes, weight gain after growth can occur due to increased muscle mass or fat accumulation. Maintaining a proper diet and regular exercise helps manage healthy weight post-growth.

When should I consult a veterinarian about my Bernese Mountain Dog’s growth?
Consult a veterinarian if your dog shows abnormal growth patterns, such as stunted growth, excessive weight gain, or signs of discomfort, to rule out underlying health issues.
Bernese Mountain Dogs typically stop growing between 18 to 24 months of age, although their growth rate slows significantly after the first year. During this period, they undergo rapid physical development, reaching most of their adult height by around 12 months, with muscle mass and overall body structure continuing to mature until they are about two years old. Understanding this growth timeline is essential for providing appropriate nutrition, exercise, and veterinary care to support their healthy development.

It is important for owners to monitor their Bernese Mountain Dog’s growth closely, ensuring they receive a balanced diet formulated for large breed puppies to prevent growth-related issues such as joint problems. Regular veterinary check-ups can help track their progress and address any concerns early. Additionally, controlled exercise routines during the growth phase can promote strong bones and muscles without causing undue stress on developing joints.

In summary, patience and attentive care during the first two years of a Bernese Mountain Dog’s life are crucial for optimal growth and long-term health. By recognizing when they typically stop growing and understanding the needs associated with each stage of development, owners can help their dogs achieve a healthy and balanced physical condition that supports their active and robust nature.

Author Profile

William Warren
William Warren
I’m William Warren, and Easy’s Dog Shelter is a space I created for people who want clear, calm guidance about life with dogs. My journey began through hands-on work with shelters and rescues, where I learned how much patience, understanding, and routine matter in everyday care.

Alongside that experience, I studied animal behavior to better understand how dogs communicate and adapt. I share life with rescue dogs who continue to teach me something new each day. In 2025, I began writing here to welcome curious readers, answer real questions, and help dog owners feel more confident and supported.