How Big Are American Bulldogs: Size and Growth

by Lisa

American Bulldogs are renowned for their strength, loyalty, and unmistakable appearance. If you’re considering bringing one into your family, you might be wondering just how big these dogs can grow. In this comprehensive guide, we will explore the size and growth patterns of American Bulldogs, shedding light on what to expect at different stages of their lives.

1. Puppyhood: The Early Days

American Bulldog puppies are undeniably adorable, but they don’t stay small for long. On average, when born, they weigh around 12-16 ounces, similar to many other dog breeds.


Within the first few weeks, American Bulldog puppies undergo rapid growth. By the end of the first month, their weight typically doubles or even triples.


At two months old, they usually weigh between 12-20 pounds, with males tending to be larger than females.


2. Adolescence: The Awkward Phase

American Bulldogs enter their adolescent phase at around four to six months of age. During this period, they experience significant growth spurts.


By six months, you can expect your American Bulldog to weigh between 35-50 pounds. However, individual variation exists, so some may be slightly lighter or heavier.

They will continue to fill out and gain muscle mass during this phase, eventually reaching their adult size.

3. Adulthood: Full Grown American Bulldogs

The American Bulldog reaches its full adult size at around 1 to 2 years of age. At this stage, their size largely depends on genetics, diet, and overall health.

On average, male American Bulldogs stand between 22 to 27 inches tall at the shoulder and weigh between 75 to 125 pounds. Females are slightly smaller, standing 20 to 25 inches tall and weighing between 60 to 100 pounds.

It’s essential to provide proper nutrition during this stage to ensure they reach their full potential size and maintain a healthy weight.

4. Exceptional Growth and Variations

While these are general size ranges, American Bulldogs can sometimes surpass them. Some exceptional individuals may grow larger, especially if they have particularly robust genetics.

Remember that obesity can be a concern in this breed, so it’s crucial to monitor their weight and provide regular exercise.

It’s worth noting that variations in size exist between different American Bulldog types, including the Johnson and Scott types. Johnson-type Bulldogs often tend to be larger and more muscular, while Scott-type Bulldogs are slightly smaller and more agile.

5. Factors Influencing Size

Genetics play a significant role in determining the size of an American Bulldog. If the parents were large, it’s more likely that the puppies will also be larger.

Proper nutrition is vital during the puppy and adolescent stages. Feeding your American Bulldog a balanced diet will support healthy growth.

Exercise is essential to maintain a healthy weight and muscle development. Regular walks, playtime, and mental stimulation are crucial.

Health conditions, such as thyroid problems, can impact a dog’s size and overall growth. Regular veterinary check-ups are essential to detect and manage any health issues.

In Conclusion

In your journey with an American Bulldog, you can expect your furry friend to go through various stages of growth, from a tiny, adorable puppy to a full-grown, powerful companion. The key is to provide the right care, nutrition, and love throughout their life stages.

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