When Do Dogs Stop Growing: A Comprehensive Guide

When Do Dogs Stop Growing

As a dog owner, it’s natural to wonder when your furry friend will reach their full size. Understanding when dogs stop growing can help you provide them with the right nutrition, exercise, and healthcare. In this article, we’ll cover everything you need to know about when dogs stop growing, including factors that affect growth and how to promote healthy growth.


Dogs, like humans, go through different stages of growth throughout their lives. While the exact timeline of growth can vary based on several factors, there are some general patterns that are typical for most dogs. In this article, we’ll explore the stages of dog growth and discuss when dogs stop growing based on their breed and size.

Factors that Affect Dog Growth

Several factors can impact a dog’s growth, including genetics, nutrition, exercise, and healthcare. Genetics play a significant role in determining a dog’s final size, but other factors can affect how quickly they reach that size. Poor nutrition or lack of exercise can cause growth to be stunted, while certain health conditions can lead to abnormal growth.

The Stages of Dog Growth

Dog growth can be broken down into four main stages: neonatal, puppyhood, adolescence, and adulthood.

Neonatal Stage

The neonatal stage is the first two weeks of a puppy’s life. During this time, puppies are entirely dependent on their mother for nutrition and care. They are born with their eyes and ears closed and spend most of their time sleeping and eating.


Puppyhood starts at around three weeks of age and lasts until about six months. During this stage, puppies start to explore their environment and learn social skills. They also begin to develop adult teeth and switch from milk to solid food.


Adolescence is the stage from six months to two years old. This stage is marked by rapid growth and the development of sexual maturity. Dogs in this stage may experience some behavioral changes as they become more independent.


Adulthood begins at around two years of age and lasts for the rest of the dog’s life. Dogs in this stage have reached their full size and are fully mature.

When Do Dogs Stop Growing?

The age at which a dog stops growing depends on several factors, including breed and size.

Small Breeds

Small breeds typically reach their full size between six and eight months of age. Chihuahuas, for example, usually stop growing at around six months, while Pomeranians may continue to grow until eight months.

Medium Breeds

Medium breeds usually reach their full size between eight and twelve months of age. Beagles, for example, usually stop growing at around eight months, while Bulldogs may continue to grow until twelve months.

Large Breeds

Large breeds take longer to reach their full size, typically between twelve and eighteen months of age. Labrador Retrievers, for example, usually stop growing at around twelve months, while Great Danes may continue to grow until eighteen months.

Giant Breeds

Giant breeds can take up to two years to reach their full size. Saint Bernards, for example, usually stop growing at around two years old, while Mastiffs may continue to grow until they are

two and a half years old.

It’s important to note that these timelines are just general guidelines and may vary from dog to dog. Some dogs may reach their full size earlier or later than the average timeline. Genetics, nutrition, exercise, and healthcare can all play a role in when a dog reaches their full size.

Promoting Healthy Dog Growth

While genetics play a significant role in determining a dog’s final size, there are several things you can do to promote healthy growth.


Proper nutrition is crucial for a dog’s growth and development. Feeding your dog a balanced diet that is appropriate for their age, breed, and size can help ensure they get the nutrients they need to grow strong and healthy. Consult with your veterinarian to determine the best diet for your dog.


Regular exercise is also important for a dog’s growth and development. Exercise helps build strong muscles and bones and promotes overall physical fitness. Be sure to provide your dog with plenty of opportunities for exercise, including walks, runs, and playtime.


Regular veterinary check-ups can help ensure that your dog is growing and developing properly. Your veterinarian can monitor your dog’s growth and identify any issues that may be hindering their growth. They can also provide guidance on proper nutrition and exercise.


When do dogs stop growing? The answer varies depending on breed and size, but there are general timelines that can give you an idea of when your furry friend will reach their full size. Understanding when dogs stop growing can help you provide them with the right nutrition, exercise, and healthcare to promote healthy growth and development.


  1. Can poor nutrition affect a dog’s growth?
    Yes, poor nutrition can lead to stunted growth or other growth abnormalities.
  2. Can overfeeding a dog affect their growth?
    Yes, overfeeding a dog can lead to excessive weight gain, which can put a strain on their developing bones and joints.
  3. Do all dogs grow at the same rate?
    No, different breeds and sizes of dogs grow at different rates.
  4. Can exercise promote healthy growth in dogs?
    Yes, regular exercise can help promote healthy growth and development in dogs.
  5. When should I take my puppy to the vet for a check-up?
    Puppies should have their first veterinary check-up at around eight weeks of age, followed by regular check-ups every few months until they are fully grown.