When Your American Bully Will Fill Out

The Complete Guide To When Your American Bully Will Fill Out

You’re in the market for a new pup and can’t find any available in the suitable age range. You’re not sure how long it takes for American Bulldogs to mature. If you want to know, then check out this blog article!


As an American Bully owner, you may wonder when your pup will finally fill out. While every Bully is different, there are some general guidelines you can follow. This complete guide will discuss everything you need to know about when your American Bully will fill out.

First, it’s essential to understand that the American Bully is a relatively new breed. As such, there is still a lot of variation in size and growth rates among individual dogs. However, most Bullies will reach their full adult size by around 18 months of age.

While some Bullies may fill out a bit earlier or later than this, the vast majority will be close to their full adult size by 18 months old. So, if you’re wondering when your American Bully will fill out, the answer is typically around 18 months of age.

Of course, every dog is different; some may reach their full size earlier or later than others. However, 18 months is generally considered the average age at which an American Bully will fill out.

What is an American Bully?

American Bully breeds come in all shapes and sizes, but they all share one common trait: they are massive. These dogs are true giants, standing anywhere from 12 to 28 inches tall and weighing between 50 and 120 pounds. But despite their size, American Bullies are gentle, loving, and highly loyal to their families.

So, what exactly is an American Bully? An American Bully is a cross between an American Pit Bull Terrier and another bully breed dog, such as an American Staffordshire Terrier or a Staffordshire Bull Terrier. These dogs were initially bred for their fighting ability, but today they are cherished family pets.

While they may look intimidating, American Bullies are amiable dogs. They love to play and cuddle with their families and are excellent with children.

However, because of their large size and high energy level, they need plenty of exercise and space to run around. They also need consistent training and socialization to prevent them from becoming overly protective of their family or territorial.

If you’re looking for a giant furry friend who always has your back, an American Bully is the perfect dog!

How to tell if your Bully will Fill Out

As your American Bully matures, you’ll notice that their bones will start to lengthen and fill out in muscle. This process starts at around 6-8 months old and can continue until they’re about 18-24 months old. Here are some signs that your Bully is filling out:

Their head will start to look more proportional to their body.

Their neck will become thicker and more muscular.

Their chest will broaden, and their shoulders will become more defined.

Their legs will become thicker and more muscular.

They’ll start to put on weight overall, but it will be mostly muscle mass.

If you’re wondering how much weight your Bully should gain during this growth period, a good rule of thumb is 1-2 pounds per month. Remember that all Bullies are different and will mature at different rates, so this is just a general guideline. Talk to your veterinarian if you have any concerns about your Bully’s growth or development.

Timeline of a typical bully’s growth cycle

Most American Bullies will reach their full size by the time they are 18 months old. However, they may continue to fill out and muscle up until they are 2-3 years old.

There are a few things to keep in mind during the growth cycle. First, ensuring your Bully is getting enough food and exercise is essential. They will need plenty of calories to support their growing bodies. Secondly, be mindful of their joints and bones.

Too much exercise or weight can strain their still-developing skeletal system. Lastly, don’t forget about socialization! Even though they are getting bigger and more challenging, American Bullies still need exposure to different people, animals, and situations to learn how to handle them calmly and confidently.

If you keep these things in mind, you will have a happy and healthy Bully as they go through their growth cycle!


We hope you’ve enjoyed our complete guide to when your American Bully will fill out. Remember that every dog is different and will grow at its own pace, so don’t worry if your Bully isn’t filling out as quickly as you’d like. Just enjoy watching them grow and mature into the excellent companion they’re meant to be.

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