Skip to content

Bullmastiff Rottweiler Mix: Meet the Brave Loyal Dog

Bullmastiff Rottweiler Mix

Have you been thinking about buying a Bullmastiff Rottweiler mix puppy? Perhaps, you are considering adopting one of these large and lovable dogs from your local rescue.

Before becoming the canine parent of this powerful mix, there are some things to understand. In this helpful guide, we will cover it all!

This large and athletic dog is intelligent, loving, and full of charisma. Sometimes called the Bull Mastweiler, the Bullmastiff Rottweiler mix is a large and capable dog with a powerful look and a loyal disposition.

Often slightly more mellow in temperament than the purebred Rottweiler, this large dog can make a great addition to most families when properly trained and socialized from an early age.

The Bull Mastweiler at a Glance

This large dog is just short of being considered a giant breed. A popular crossbreed of the Bullmastiff and the Rottweiler, this is a powerful family-oriented mix. This dog should be closely supervised around others to prevent injuries unless properly socialized from a young age.

These dogs can be intelligent and easy to train. However, they may have a somewhat stubborn side. As such, an experienced owner is the best option for this large dog.

Popular with Rottweiler and Bully lovers alike, this hybrid has actually been around for many years. This mix is more common than many would think.

The History of This Hybrid

The Bullmastiff and Rottweiler hybrid has been around for years. Both the Bullmastiff and the Rottweiler are popular dogs that have been used for guarding purposes throughout history.

As guard dogs and property protection animals, both of these breeds have a keen sense of awareness.

To help you truly understand this mix, we will break down the breeds that make up the Rottie Bullmastiff.

Bullmastiff History and Origin

The Bullmastiff is a large working breed dog that originated in England in the mid-eighteen hundreds.

These dogs were used as estate guardian animals and were also relied on to ward off poachers. Bred by gamekeepers for their strength, size, speed, and formidable appearance, these dogs can be traced back to the original Bully breeds.

In 1924, the bullmastiff breed was deemed a purebred dog by the English Kennel Club. The genetic background of this canine consists of approximately 40% Bulldog and 60% Mastiff. In the year 1934, the American Kennel Club also began recognizing Bullmastiffs as purebred dogs.

The Origin of the Rottweiler

Although the precise origins of the Rottweiler breed are unknown, these dogs are believed to be descended from Roman drover cattle dogs.

In the Roman region of Rottweil, Germany, these dogs were used as guardians and land protection animals. They were also used for a range of herding applications and were even preferred by the Roman army.

Later, in the Middle Ages, Rottweilers would accompany butchers for protection when buying and trading.

Additionally, Rottweilers were used to pull carts and goods. The Rottweiler breed was first officially recognized by the American Kennel Club in the year 1931.

Understanding This Don’s Need to Work

As you can see, this mix has a long history of assisting its owners with working applications and guardian jobs. Therefore, you will want to give your Bullmastiff Rottweiler mix a job to do.

Otherwise, this dedicated and intelligent animal will find ways to keep itself busy.

Although this mix can be mellow and laid-back, in many cases, these dogs will want to go to work for you.

Reasons Why You Shouldn’t Get a Bullmastiff Rottweiler Mix

Before we can go over everything that we love about this mix, there are a few things that you should know.

First of all, the Bullmastiff Rottweiler mix is a large breed of dog. Powerful and athletic, this hybrid is not for the faint of heart.

With the tendency to become stubborn, dominant, protective, or in some instances, aggressive, this is a mixed breed for experienced owners only. Additionally, this mix may be mellow or very active.

The activity levels of this hybrid will depend on many factors including its breeding, temperament, and unique personality traits.

As such, you should be ready to dedicate plenty of time and energy to training and daily physical activity like walks.

Although this dog may be mellow and calm, the mix also has an equal chance of becoming highly active.

When it comes to energy levels, expect a mixed bag with this hybrid. If your dog happens to be on the active side, living in small spaces with no yard or apartment living will be challenging.

Keep in mind that this mix may also suffer from a range of common large breed health issues due to its massive size. So, you will want to be prepared to pay veterinary bills.

In fact, owning a large breed or giant breed can cost three times as much as owning a small breed dog.

Finally, this hybrid is not a purebred dog. As a mixed breed, it combines one Rottweiler and one Bullmastiff parent.

Certain traits like appearance, temperament, personality, and even size, can be unpredictable with this dog.

Therefore, unlike with purebred dogs, it can be hard to know exactly what to expect with a mix like this.

This can make it difficult to anticipate potential training and health-related issues that may arise in the future.

Reasons to Avoid Rottie Mastiff Mixed Breeds

  • Potential to become stubborn or aggressive
  • May be highly active and require lots of physical activity
  • Known to suffer from large breed health issues
  • Dangerous if not trained and socialized properly
  • Requires a confident experienced owner
  • As a mixed breed, some characteristics are unpredictable

Reasons Why You Should Get a Bullmastiff Rottweiler Mix

Now that we’ve gone over some of the reasons to avoid this mix, let’s discuss why we love Bullmastiff Rottweiler hybrids. After all, this loyal, loving, and smart puppy can make a great addition to the right household.

First of all, the Bullmastiff Rottweiler mix is an attractive and athletic-looking dog. Large and capable in appearance, this is the type of pup that will turn heads wherever you go.

In fact, some would even describe this dog as intimidating. However, most Bull Mastweilers are loving gentle giants at heart.

In fact, when this dog is raised in the right household with plenty of socialization, it can become one of the sweetest mixes around.

Additionally, this dog is smart and eager to please with a loyal disposition. This is the type of Mastiff mix that will stick next to its owner and guard its family to the very end.

Also, Rottweilers are known for getting along well in a family setting. This hybrid may also have a very mellow temperament and do well with small children if socialized early and often.

With an athletic and muscular build and naturally protective instincts, this is a wonderful choice for the right family!

Finally, as a mixed breed, this dog is likely to be slightly healthier than purebred Bullmastiffs or Rottweilers. Over the last decade, overbreeding has led to a range of health issues in purebred dogs.

Since this is a mix, there is a good chance that you can avoid some of these overbreeding issues.

Reasons to Love the Bull Mastweiler

  • Intensely loyal to its family
  • Loving and eager to please
  • Large and muscular
  • Athletic and capable
  • Protective and devoted
  • Comes in many coat colors
  • Intelligent and trainable
  • Likely to be mellow and calm

Appearance of a Bullmastiff Rottweiler Mix

In appearance, this crossbreed is large and well-muscled with a nearly square symmetrical appearance.

These dogs are slightly longer than they are tall with heads that are flat and broad on the top. Then, these dogs will either have round or almond-shaped eyes that will have a keen expression.

Usually, this mix will have V-shaped or triangular ears that sit high on the head and fold slightly on the sides.

They showcase a short and dense coat that may or may not have a thick undercoat. The thickness of the undercoat will depend on whether the dog leans more toward its Mastiff or Rottweiler genetics.

Rottweilers are around 24 inches high at the shoulder and 100 pounds. A Bullmastiff weighs around 110-120 pounds and will be about 26 inches tall when fully grown.

When combined, a Bullmastiff Rottweiler can be anywhere from 24 to 27 inches tall and weigh anywhere from 100 to 120 pounds.


In adulthood, this dog will be 25 inches tall at the shoulder on average.


When fully grown, this dog will weigh around 110 pounds on average.

Coat And Colors of a Bullmastiff Rottweiler Mix

A Rottweiler Bullmastiff may get its main coat coloration from either side of the family. If this dog has more Rottweiler than Mastiff in its genetics, you can expect a dark coat with lighter markings around the ears and muzzle. The legs and belly may also be lighter in color.

Alternatively, Rottweiler Bullmastiffs that lean more toward the Mastiff side of things can come in a range of coat colors including Brown, Tan, Red, Roan, Blue, Brindle, Silver, and pretty much everything in between.

Personality of a Bullmastiff Rottweiler Mix

The Rottweiler Bullmastiff hybrid is less aggressive and more intelligent than a standard Mastiff or purebred Bullmastiff.

Additionally, these dogs are known for being slightly calmer and less stubborn than the purebred Rottweiler.

With proper socialization and handling, this can be an extremely well-balanced and amiable dog that will fit in well in almost any setting.

Keep in mind that each dog is unique and may showcase its own special personality traits. Additionally, the upbringing, training, and life experiences of your specific Bullmastiff Rottweiler mix can significantly impact its overall personality.

Lifespan of a Bullmastiff Rottweiler Mix

The lifespan of a Rottweiler can range anywhere from 10 to 15 years. Similarly, the lifespan of a Bullmastiff can be anywhere from 9 to 13 years. So, on average, you can expect this mix to live at least 10 years and as long as 15 years.

With exceptional care, a high-quality diet, plenty of exercise, and regular veterinary visits, the lifespan of this mix can be extended even further.

Other Traits of a Bullmastiff Rottweiler Mix

Since this mix was developed from two consummate guard dogs, you can expect it to be a fantastic guardian and protector in your family. Like with both of his parents, these dogs are protective, devoted, and alert.

Dedicated to their families and loyal to a fault, this dog can be taught to complete a range of tasks. This breed is especially well-suited to tasks that relate to guarding, protection, and the like.

Bullmastiff Rottweiler Mix Puppies For Sale

If you are interested in adopting a Rottweiler Bullmastiff puppy of your own, there are a few things that you will want to watch for.

First of all, only purchase a puppy from a reputable breeder with a good reputation and a background in large breeds. Particularly, make sure that your breeder is experienced with Mastiff and Bully breeds.

Additionally, be sure that your breeder has completed the necessary health and genetic background checks on both parents.

Checking both breeding parents for potential genetic issues like hip dysplasia and cardiomyopathy is wise. This will reduce the chances of any puppy that you adopt having these genetic issues.

Finally, look for a puppy seller and breeder that takes the time to properly socialize all of the puppies that they are selling. With this guardian breed, socialization is an essential part of a healthy happy dog.

Bullmastiff Rottweiler Mix Health Problems

Rottweilers are known to suffer from common large breed health issues such as hip dysplasia, Osteochondrosis of the Ankle or Spine, Entropion issues, and Subaortic Stenosis.

Careful breeding and a large-breed orientated healthcare plan can prevent or minimize the risks of these issues.

Also, this mix may have skin sensitivity issues. To help prevent itching or skin problems, use hypoallergenic shampoos.

Having an experienced vet in your corner and taking this dog to regular check-ups can help you keep these issues at bay or even avoid them entirely.

Bullmastiff Rottweiler Mix Food Requirements

Be sure to use a large-breed-friendly dog food from puppyhood. This will help you avoid issues like hip and elbow dysplasia later on.

Since large breed dogs tend to grow rapidly, ensuring that they are getting the correct protein intake can help you prevent a range of problematic health issues from developing.

There are many wonderful large breed dog and puppy foods available today. Before settling on a designated brand of puppy food, it may be wise to consult with your veterinarian. Additionally, certain raw food diets can be beneficial for large breeds such as this.

Bullmastiff Rottweiler Mix Exercise Requirements

This dog may have minimal, moderate, or high activity levels. It will all come down to your unique dog.

With this in mind, Rottweiler Bullmastiff mixes are generally less energetic than purebred Rottweilers. However, they tend to be more energetic than purebred Bullmastiff.

As such, you will want to have a plan in place to provide this dog with regular physical activity. A long daily walk or an invigorating game of fetch will usually be enough to keep your dog calm and in good shape.

In many cases, these dogs will spend most of the day keeping an eye on your property, car, family, or anything else going on around them. Puzzle toys and dog-safe bones can also help to keep your dog’s mind engaged.

Bullmastiff Rottweiler Mix Training

When it comes to training, this dog should be trained early and often. A confident and experienced owner is important.

Obedience training from an early age may also be a wise investment. Basic training should begin as soon as a puppy is brought home at around eight weeks of age.

Since this is a guardian and protection crossbreed, it is essential that socialization starts early and stays consistent throughout the dog’s life.

The sooner socialization and training begin, the more likely this dog is to lead a balanced, happy, and safe lifestyle.

During the first year of life, socialization can have a significant impact on the temperament, personality, and tendencies of a dog. Socialization is what will give your dog the ability to get along well with others.

Bullmastiff Rottweiler Mix and Families

With proper handling and socialization, the Bullmastiff Rottweiler mix can get along great with families.

However, since this will be a large dog, it may have the tendency to knock over small children accidentally.

As such, adult supervision is recommended. This goes for any large breed of dog that will be around children at any given time.

Bullmastiff Rottweiler Mix and Other Pets

As with children, if this dog is socialized early and often from puppyhood, it will get along fine with other animals.

However, if you are adopting an adult Rottweiler Bullmastiff mix, be sure that it is safe around other animals, particularly other cats and dogs.

Grooming Your Bullmastiff Rottweiler Mix: Tips and Tricks

Since this dog will require routine bathing, you should begin acclimating your puppy to the bathtub at an early age.

This will help to ensure that bathtime goes smoothly. Expect to bathe this dog every two to eight weeks depending on its activity levels and lifestyle.

This pup has the potential to possess the thick undercoat often seen in Rottweilers. Undercoats like this may mean shedding at multiple intervals throughout the year.

Not to mention, the topcoat will also likely shed. With the potentially dense coat of this dog, bathing will minimize shedding and help with healthy skin.

Grooming Aspects to Consider

There are many components to consider when grooming a large dog like this. After all, this powerful breed can put up quite a struggle if he or she is not in the mood for bath time or a trip to the groomer.

Also, this large dog has the potential to shed, smell, and track dirt all over your home. So what is the solution? Well, first consider what grooming tasks will need to be tackled most often.

Frequent Grooming Tasks Will Include:

  • Washing the facial area
  • Bathing regularly with shampoo and conditioner
  • Brushing out the undercoat if your dog has one
  • Nail trimming
  • Groomer visits

Ways to Make Bath Time and Grooming Easier

Another smart step to take when caring for the grooming needs of this mixed breed has to do with acclimating your puppy to regular grooming tasks from the get-go.

Remember, this mix can get stubborn about grooming and baths. Always make bathtime or grooming appointments fun and rewarding experiences for your dog!

With a powerful mix like a Rottweiler Bullmastiff, positive reinforcement and confidence are key.

First, make sure to get your dog used to regular nail clipping sessions. This mix can have long and thick toenails which grow rapidly and must be clipped every eight weeks.

Next, getting a puppy used to the blowdryer from a young age using positive reinforcement can make things go easier.

If the noise of the blow-dryer frightens your dog, it may be good to begin training him not to fear loud noises in general.

If you plan to take your Bullmastiff Rottie mix to the groomer, acclimating them to the grooming parlor at an early age is also wise. You may want to supervise grooming at first.

At the very least, choose a groomer with good recommendations and a trustworthy reputation.

Many great products allow you to keep your dog calm while it has a bath. For instance, certain shower-compatible wall-mounted treat dispensers exist.

These kinds of products can make bathtime much easier for you and your dog.

Related Post