When Will My American Bully Fill Out? A Timeline

If you’re an American Bully owner, you probably know they can change from being adorable little furry creatures to becoming big adults who are a mess in an instant. You can tell if your puppy is growing healthily as anticipated by learning when to expect them to fill out.

When will my American Bully fill out? Your American Bully will begin to fill out around the age of 1 year. Bigger American Bully pups will keep growing until they are between 18 and 24 months old. If you think your Bully is not growing as it should be, consult a vet to determine the cause of any growth inconsistencies in your puppy.

Keep reading to learn more about how big should your American Bully get, and how to take care of it to reach its peak growth.

The American Bully Growth Chart

American Bullies have been specially bred for their mild and friendly demeanor, despite their intimidating appearance. If you have one, you probably already know that they make a charming, devoted, and affectionate companion.

The fact that American Bullies are listed as a small-to-large breed in terms of size doesn’t really tell us much. So, here are the sizes the American Bullies are classified into, as well as their growth chart.

TypeMale SizeFemale Size
Standard American BullyHeight: 17 to 20 Inches
Weight: 60 to 80 Pounds
Height: 16 to 19 Inches
Weight: 60 to 80 Pounds
Classic American BullyHeight: 17 to 20 Inches
Weight: 60 to 80 Pounds
Height: 16 to 19 Inches
Weight: 60 to 80 Pounds
XL American BullyHeight: 20 to 23 Inches
Weight: 74 to 130 Pounds
Height: 19 to 22 Inches
Weight: 74 to 130 Pounds
Pocket American BullyHeight:14 to 17 Inches
Weight: 10 to 20 Pounds
Height:13 to 16 Inches
Weight: 10 to 20 Pounds
Extreme American BullyNo official info.No official info.

Standard American Bully

The Standard Bully was developed as both a companion dog and a show variation of the American Pit Bull Terrier.

The females are typically 16 – 19 inches tall, while the males are typically 17-20. The weight fluctuates from female to male from 60- 80 pounds. They normally live between 10 to 14 years.

They typically have broadheads that are substantial and proportionate to their stature, but they also have prominent cheek muscles and big skulls. They have strong, muscular bodies and clearly defined jaws. They appear very strong because of their broad chests.

Classic American Bully

The classic American Bully

The Classic American Bully is a subtype of the Standard Bully distinguished by its physique.

The Classic Bully has a lighter body structure and a smaller overall body mass but still displays “bully” characteristics. Its appearance is reminiscent of the American Staffordshire Terrier or the original American Pit Bull Terrier.

The Classic Bullies share the same attributes as the Standard Bullies, despite having a smaller physical build. The females are typically 16 – 19 inches tall, while the males are typically 17 – 20. They weigh 60-80 pounds and generally live between 10 and 12 years.

They often have big heads and are sturdy and fierce-looking; however, they are less bulky and muscular than the Standard Bully.

Classics have a broad chest, lighter build, and fewer muscles, giving them a commanding appearance. Their necks are somewhat arched, and they have strong necks and shoulders.

The Classic Bullies are tolerant of kids and pleasant with strangers despite being guardians of their home and family. They are also extremely agile and have a high pain tolerance.

XL American Bully

XL American Bully

The XL Bully has a similar build to the Standard, despite being bigger and taller. Due to their larger body mass than Standards, XLs are considerably heavier. They share many characteristics with the Standard, and they are currently the biggest American Bully.

When compared to the Classic and Standard Bullies, they have a significantly larger body structure. The females are typically 19 – 22 inches tall, while the males are typically 20 – 23. They weigh from 75 to 130, according to gender. They usually live between 10 to 12 years.

They are bigger and thicker than other American Bullies, but they have the same sturdy, thick physique as the Standard.

They have broad, deep chests and large, sturdy heads. They have a distinctive appearance with prominent cheek muscles and well-defined jaws. Moreover, they have thick shoulders and a strong, somewhat arched necks.

Pocket American Bully

The Pocket Bully

Pocket Bullies are, as you can guess, physically smaller than Standard Bullies yet share many of the same characteristics.

Generally, males range in size from 14 to 17 inches and females from 13 to 16 inches. Moreover, they weigh 10-20 pounds. They usually live between 10 and 12 years.

Their heads are proportionate to their bodies, and they have broad chests and muscular bodies. Although they are often smaller than the other sizes, their proportions are similar.

Because they are reasonably easy to care for, Pockets are very popular. This is due to the fact that they have short fur and just need little brushing.

Extreme American Bully

The extreme bully is, well, a bit extreme

There is no official size for the Extreme American Bully. They are nonetheless described as having a thick, hefty bone structure and being smaller than the Standard American Bully; however, they’re wider. They have a 10 to 12-year life expectancy.

Extreme Bullies have a rugged appearance thanks to their large chests, chiseled necks, and powerful shoulders. Additionally, they are characterized by looser lips and a higher rear than other varieties of American Bullies.

When Are American Bullies Fully Grown?

Puppies continue to grow even though they are considered adults when they reach 12 months old. It could take between 6 to 24 months for their height, size, and bones to mature. You want to learn when your American Bully puppy will reach adulthood if you’re the new or future owner.

It takes about 24 months for large dog breeds like the American Bully to be considered fully grown.

There is no set weight for every type of American Bully; however, their weight should always be proportionate to their physical size. An American Bully typically weighs between 66 to 88 lbs.

Keep in mind that even in the same breed, some dogs will grow more slowly or quickly than others. Make sure your Bully receives the greatest nutrition available and grows up in a healthy environment.

How to Tell If Your American Bully Is Growing Normally?

You have nothing to worry about if you’ve been feeding your pup a healthy and balanced diet and keeping it active. However, it is still possible for your dog to be overweight or underweight.

If your Bully is underweight, it will be easily detectable due to its ribs being visible from the underbelly, as American Bullies are known for having less fur than other breeds. In this case, I strongly advise speaking with your vet before boosting your puppy’s food intake.

If you notice that it is overweight. it is strongly advised that you up your Bully’s exercise regimen to burn off the additional body fat.

You should consult your vet for appropriate guidance if you believe your puppy’s weight is below or above normal. Irregular weight may indicate an underlying medical condition.

How to Help Your Bully Grow Healthily?

a photo of a Bully to show when will  my American bully fill out


Due to their high muscular build, American Bullies need a high-protein diet. It’s even more crucial for them to have said diet as they grow up. 

Puppies tend to require more calcium-rich foods to aid them with bone growth as well as fats which are a great source of energy for them.

In order for you to supply your dog with adequate nutrition to improve its genetics, it would be essential to give your puppy a nutritious meal three times every day. You can learn more about what American Bullies can eat here.


The American Bully is known for having a muscular physique and an energetic and active personality; as a result, all that energy needs to be let out and channeled through exercise and games. 

Once your pups have been properly vaccinated, they should get at least 30 minutes daily of activity.

For example, a classic game like fetch is a fantastic way to instill obedience and create trust between you and your dog from an early age. Swimming can also allow them to use all that unreleased energy.


As soon as you and your cute American Bully pup arrive home, that’s when you should begin obedience training. Training them will help him develop social skills and teach him how to behave well around other dogs and humans.

You should consider utilizing treats as a form of motivation throughout the training process as Bullies are clever creatures that thrive on positive feedback. Check out this article to learn more about training American Bullies.

Vaccinations and Regular Vet Checks

As previously said, an appropriate diet is the first step in caring for your dog. Therefore, having a professional veterinarian on your side may do wonders for your Bully, as vets may do much more than merely check for ticks.

They are pet nutrition specialists and can create a diet plan for your buddy. 

Moreover, vets can also administer and recommend vaccinations. They will also help schedule additional booster shots. Vaccinations are a crucial part of keeping your Bully healthy for many years to come. Especially young pups, as they have not yet developed immune systems, they are more vulnerable to illnesses.

Most vaccines are given between the ages of 6 and 14 weeks. Rabies, distemper, parvovirus, and adenovirus are the most common vaccinations that are lethal to dogs and, in certain situations, people as well.

It takes roughly four months to achieve complete immunity. Therefore, it is critical to understand that vaccinations do not take action immediately after injection. It usually takes approximately a week for them to take effect. Additionally, booster shots can be used when needed.

Other Ways to Help Your Bully

Your American Bully needs a routine to avoid bad behavior resulting from unexpected and stressful situations. Moreover, you have to spend quality time with it. This entails exercising, going to dog parks, playing, and even cuddling.

It goes without saying that you should do your best to take care of your American Bully for it to be the best boy ever.

My Top Picks for American Bullies!

Related Questions 

How Much Does It Cost To Own An American Bully?

It costs around $2,500- $5,000 to purchase an American Bully puppy. A Bully will also probably cost you around $16,135 over the course of its lifetime. This includes providing its needs, such as food requirements, license requirements, medical fees, training expenses, and grooming fees.

Helpful Resources

The American Bully Breed Standards

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