When Do Puppies Stop Growing?

When Do Puppies Stop Growing

Puppies grow from a small size to a full adult size at various rates. Some breeds take longer to grow while others finish their growth at a later age. While the average puppy will grow to the size of an adult dog within a year, larger breeds, such as Great Danes and Chihuahuas, may take more time to mature.

Larger breeds take longer to reach full size

Large dogs grow slowly, with some taking up to 16 months to reach full size. These breeds include the Labrador Retriever, German shepherd, and Alaskan malamute. These dogs are excellent guard dogs, although they do not grow as fast as smaller breeds. Larger dogs are also referred to as giant breeds, and they can weigh over 100 pounds at full maturity.

  • Adult size 

A dog’s adult size depends on several factors. For instance, small dogs mature quickly, finishing their growth at around eight to 12 months. Medium dogs mature at around twelve to 15 months. Giant breeds, on the other hand, take up to three years to reach full size.

  • Medium size

Medium dog breeds take longer to reach full size compared to toy breeds. Some of these breeds will stop growing between six and eight months, while some will take a little longer than this. Some, like the Basset Hound and the English Bulldog, will reach full size at approximately 18 months.

  • Small size 

Chihuahuas are one of the smallest dogs, weighing five ounces at birth and up to six pounds at full growth. In contrast, Bernese mountain dogs weigh only one pound at birth and grow to be over 100 lbs. As such, they have more growing to do than Chihuahuas do.

The growth rate of each breed varies greatly. Toy breeds reach T99 at nine or ten mo, while small and medium breeds reach T99 at ten to twelve mo. Large breeds reach T99 at fifteen to seventeen months. The logistic curves for each breed are shown in Figure 1. The fit between the equation and the growth curves was very good.

Smaller breeds finish growing in less than a year

Smaller breeds of dogs finish growing in less than a year, whereas large and giant breeds grow at a slower rate and finish growing at around 12 to 18 months. In addition, these dogs have larger bones, so they need more time to grow to their full size. Mastiffs, for instance, may reach their full size at 24 months of age.

However, this doesn’t mean that a large breed won’t continue to grow. Some breeds, including the Bullmastiff, can continue to grow until they’re around 30 months old. However, it is worth noting that some smaller dogs, such as the Chihuahua, Toy Poodle, and Miniature Pinscher, will finish growing before they’re a year old.

Giant breeds finish growing when their growth plates close

While most puppies grow to their final size around nine to 11 months old, some breeds like the Irish Wolfhound and Great Dane continue growing and may reach their adult height at two or three years of age. As adults, they can weigh as much as 150 pounds. This means that they need a lot of space to mature. This is why they should have an expansive yard and home. They will need room to run and play.

A dog’s growth is regulated by a process called the growth plate. These growth plates are soft areas at the ends of long bones in the puppy’s body. These growth plates contain cells that help the bones grow. The cells divide until the growth plate is full. When a puppy reaches 18 months of age, its growth plates will be closed.

When growth plates are open, they are highly unstable and prone to damage. This can result in incongruent joints and anatomical deformities. In addition, rapid growth can reduce bone density. Therefore, it is important to provide the proper nutrients to the puppy to help protect the joints of your puppy.

The diet should be adapted to the size of your puppy. Growth diets for large-breed puppies are less calorie-dense and contain higher levels of calcium, phosphorus, and other nutrients to aid in their development. These growth diets also contain adequate calcium, phosphorus, and vitamin D.

Signs of a healthy puppy

  • Cleanliness 

One of the first signs of a healthy puppy is clean, clear stools. Puppy stools should not have flakes or blood, and the skin should be soft and shiny. The puppy should also have good muscle tone. The mouth of a healthy puppy should have clean, fresh-smelling gums. There should be no sores or plaque on the teeth, and the mouth should be wide and relaxed. A healthy puppy should not pant excessively, which could be a sign of a medical problem.

A healthy puppy’s ears should be clean. They should be cleaned regularly to prevent infection. An infection in the ears can cause severe discomfort for your puppy, so make sure you wash their ears frequently.

  • Weight 

Another sign of a healthy puppy is its weight. A puppy that is overweight can have several health problems, including diabetes, heart disease, and bone disease. The correct weight for your puppy will vary, so be sure to check its measurements regularly. Also, if the weight drops too much, that’s not a good sign. Make sure your puppy has the right amount of food so it gets the right nutrition.

  • Playing nature

Another sign of a healthy puppy is its willingness to play. Healthy puppies will be eager to play with toys and interact with their owners. They will also want to explore their surroundings. They will also be happy when you bring them home, and will not be depressed or lethargic. However, if your puppy starts to become lethargic or withdrawn, it may be a sign of illness or anxiety.

  • Checkups 

If your puppy starts to vomit or has loose stools, you should immediately visit your veterinarian. It may have diarrhoea caused by some parasites, or it may have a new diet that’s hard on its digestive system. Your vet can recommend the right treatment for your puppy, depending on its needs.


As a new pet parent, you have a large responsibility to care for your puppy. To make sure your puppy stays healthy, it’s a good idea to educate yourself about puppy health. It can be intimidating at first, but with a little research, you can make the right choice for your new companion.

Read also: When Does a Maltipoo Stop Growing?

When Do Puppies Stop Growing?

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