Animals/ Pets

Puppy Growth Chart & Stages: How to Tell When a Puppy Is Fully Grown

There’s nothing like the joy of welcoming an adorable puppy into your home. Once you’ve made preparations for the arrival of your new puppy, then you’ll be able to enjoy watching them grow into mature dogs! When you adopt a puppy, you don’t know how large it’ll get to its adult size, particularly if you adopt an animal mix.

Stages of Puppy Growth

Many believe puppies stop expanding when they turn just one year old; it isn’t true across all breeds. The stages of growth for puppies vary according to breed, and there’s an absence of a “one size fits all” chart for a puppy’s development. Most species reach full maturity between 12 and 18 months. However, the giant breeds may take longer. This is because larger breeds require extended periods for their joints and bones to fully develop. Puppy puppies will have the highest growth rate during their first six months. Most puppies will be 60 percent of their adult size at just four months old. The first sign of skeletal growth is at this point, and once this stage is over, your dog will stop growing. Your dog will grow and grow the muscles and fat similar to humans!

Be aware that growing up with a puppy involves their bodies and minds. It takes time for the puppies to grow up and behave as adults. For instance, Border Collies and other herding breeds don’t develop and stop acting like young puppies until they are about two years old.

One way to tell when your puppy is an adult is to be aware of their behavior. One of the biggest problems of raising puppies is the stage of biting. However, this article will help your puppy remove the habit permanently! If they stop their infancy destructive, hyperactive, or reckless behavior, it’s a good bet that they’ll reach adulthood not too far away.

It is crucial to give your pet the right amount and type of food throughout every stage of their lives. This useful guide will assist. If your pet isn’t as enthusiastic about eating as you’d like them to be, you can use these food toppings to get your pet to eat.

Small Breeds

Small breed puppies are likelier to attain their full-size frame between 6 and 8 months old. They’ll generally reach their ideal weight at 12 months of age.

Small breeds are:



Boston Terriers

Medium Breeds

Medium breeds usually achieve their full-size frame by 12 and 15 months; however, they don’t gain full capacity until they’re about 18 months old.

Medium breeds comprise:

Border Collies

Standard Poodles

Pit Bulls

Large Breeds

The bigger the dog breeds, the slower their growth rate. Most large puppies aren’t fully grown until they’re 15-18 months old and will not gain their adult size until around two years old.

Large breeds are:

German Shepherds



Giant Breeds

The big boys are the most difficult to grow into their full size. The foundation of their frame is established in 18 months. However, gaining their maximum capacity and weight may take two or three.

Large breeds are:

Saint Bernards