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Bullmastiff Scientific Classification

KingdomAnimaliaPhylumChordataClassMammaliaOrderCarnivoraFamilyCanidaeGenusCanisScientific NameCanis Lupus

Bullmastiff Conservation Status

Bullmastiff Locations

Bullmastiff Locations

Bullmastiff Facts

TemperamentDevoted, alert and fearlessTrainingShould be trained from an early age due to their independent natureDietOmnivoreAverage Litter Size8Common NameBullMastiffSloganCourageous, loyal and calm!GroupMastiff

Bullmastiff Physical Characteristics


  • Brown
  • Fawn
  • Black
  • Tan
  • Cream

Skin TypeHair

Bullmastiff Images

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The Bullmastiff is a very loyal and loving dog to the people they know and trust. Since they were bred to protect, this breed is also very brave.

Bullmastiffs were bred by mixing Bulldogs and Mastiffs in England. They were bred to parole country estates and protect them against poachers. These large dogs with their short muzzles could run quickly enough to catch a poacher and pin him to the ground until a gamekeeper could intervene. They later became popular additions in English dog shows.

Owning a Bullmastiff: 3 Pros and Cons

Easy to groom
These dogs are easy to groom. They don’t shed very much, and regular brushing is all that their coat will need.
Can be aggressive
If not properly socialized and trained, they can be aggressive towards strangers or other dogs.
This breed is very loving and affectionate with their family members.
Challenging to train
They can be stubborn and may be difficult to train.
Moderate exercise needs
They don’t have super high exercise needs. A simple walk or some play time in a fenced-in backyard should suffice.
Barks a lot
They have a greater tendency to bark than many other dog breeds.
Bullmastiff isolated on a white background

Bullmastiff Size and Weight

Bullmastiffs are a large dog breed. Males weigh between 110 and 130 pounds and are between 25 and 27 inches tall. Females are slightly smaller and weigh between 100 and 120 pounds and are between 24 and 26 inches tall. When they are three months old, Bullmastiff puppies generally weigh between 34 and 43 pounds. Puppies should weigh between 63 and 77 pounds. A Bullmastiff will be fully grown by the time they are 19 months old.

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Male25 inches to 27 inches110 pounds to 130 pounds
Female24 inches to 26 inches100 pounds to 120 pounds

Bullmastiff Common Health Issues

Overall, this is a healthy breed of dog, but there are a few common health issues that impact this breed. All owners should be aware of these issues and contact their vet if they are concerned.

Since Bullmastiffs have a short muzzle, they are more prone to suffering from heatstroke or heat exhaustion. It is important to keep this breed indoors during particularly hot days. During warmer months, try to exercise your Bullmastiff earlier in the morning or in the evening when it is cooler outside.

Hip dysplasia is another health concern that some Bullmastiffs may face. Hip dysplasia is passed down through the parents, so it is important to find out the history of a dog’s parents from a breeder. Hip dysplasia is a condition where the thighbone doesn’t fit correctly into the hip bone. The two bones will rub together, causing pain and possibly limping over time.

Some Bullmastiffs may also develop hypothyroidism. This condition is caused when there is a deficiency in the dog’s thyroid hormone. It can lead to other problems such as obesity, lethargy, and infertility. Dogs with hypothyroidism will need to be medicated for the rest of their life.

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To review, three common health issues that Bullmastiffs may face are:

  • Heatstroke/heat exhaustion
  • Hip dysplasia
  • Hypothyroidism

Bullmastiff Temperament and Behavior

This breed has a calm temperament. These dogs can be very gentle and loving when they are with their family members that they know and trust. These traits make them a good pick for families with older children who are on the calmer side.

However, when a Bullmastiff encounters a stranger, their behavior can change to be more suspicious or aggressive. They are independent dogs who are not always easy to train. They do best with experienced owners who know how to be both loving and firm.

How to Take Care of a Bullmastiff

When planning to take care of a Bullmastiff, you should think about this breed’s temperament, nutritional needs, common health concerns, and other unique traits.

Bullmastiff Food and Diet

Finding a healthy and nutritious food that will meet a your dog’s needs is important. Look for large-breed dog food options from reputable companies. If you are unsure if a food is right for your dog, your veterinarian is always a good resource.

As a large-size dog, Bullmastiffs eat a lot of food. Most will eat between 3 1/8 and 4 1/8 cups of food each day. The exact amount of food your dog will need will depend on his weight, activity level, health concerns, age, and other factors. Splitting the total amount of food that your dog needs into two portions is important in preventing bloat, which can be caused when dogs eat too much at one time. You should also avoid giving your Bullmastiff vigorous exercise right before or right after they eat; this can also be a cause of bloat.

Puppies should be fed a large-breed puppy food. This will help them to grow at a steady rate that isn’t too quick. They should be fed multiple times throughout the day to accommodate for their smaller stomachs. As the puppies get older, the number of times they eat each day can be reduced.

Bullmastiff Maintenance and Grooming

During their shedding season, this breed will shed some. However, keeping your dog well-groomed and brushing them can keep the shedding at bay. Be sure to monitor your dog’s skin. If you notice that it is too dry to too oily, it could be an indication that their nutritional needs are not being met or that they have developed an allergy to something.

Bullmastiff Training

Because this breed is stubborn, it can be a challenge to train. Many times, these dogs will do best when they are enrolled in an obedience class from a very early age. Making sure your dog is properly trained and socialized from an early age is very important for keeping this breed under control. Early training can also help a Bullmastiff develop a stronger breed with his owner.

Bullmastiff Exercise

Even though some dogs will seem content just lying around or hanging out in the house all day, it is important to make sure this breed gets exercise every day. Taking your dog for a walk and playing with them in a fenced-in backyard are great ways to get them the activity they need.

Bullmastiff Puppies

If you will be brining home a Bullmastiff puppy, you will want to make sure your house is ready for the dog. Puppy-proof your home by removing anything potentially hazardous or that you wouldn’t want to get destroyed by a dog chewing on it.

It will be very important to begin training your dog as soon as you bring them home. Bullmastiffs will be much easier to manage when they are smaller, and the earlier they start the training process, the easier it will be. Make sure to find opportunities to socialize your dog as well. This will help them learn how to act around other people and dogs.

Crate training your Bullmastiff can help with potty training. It can also help prevent the puppy from chewing up your things when you are away from the house.

Bullmastiff puppies will need some play time and exercise. However, you will want to be careful not to overexercise a puppy since they go through period of rapid growth. Too much exercise can have a negative impact on the development of their bones and muscles.

Bullmastiff puppy in the grass

Bullmastiffs and Children

When raised alongside a child, a Bullmastiff can be a good family pet. They are very loyal to the members of their family and can be quite affectionate. It is important to note that Bullmastiffs are not trusting of other people, which could pose a problem when children bring friends to the home.

Dogs similar to Bullmastiff

Boxers, Bulldogs, and Tibetan Mastiffs are three dog breeds that share some common characteristics with Bullmastiffs.
• Boxer: Boxers and Bullmastiffs were both bred to be working dogs. They both are moderate shedders who are relatively easy to groom. Bullmastiffs are larger than Boxers, however. The average weight of a male Boxer is about 65 pounds, whereas the average weight of a Male Bullmastiff is about 120 pounds.
• Bulldog: Bulldogs are on of the two breeds that were used to create the Bullmastiff. Like the Bullmastiff, they have a very short muzzle. Both dogs can be affectionate and may develop separation anxiety if left alone for too long. Bullmastiffs are significantly larger than Bulldogs. The average weight of a male Bullmastiff is 120 pounds, while an average Bulldog weighs just 54 pounds.
• Tibetan Mastiff: Tibetan Mastiffs are even larger in size than Bullmastiffs. Their average weight is 155 pounds, while a male Bullmastiff’s is 120 pounds. Tibetan Mastiffs are also more likely to bark than Bullmastiffs are. Both dogs can be very territorial. They also can both make a great family dog.

Famous Bullmastiffs

There are a number of Bullmastiffs that have been featured in television shows and movies. Some of them include:
• Butkus: Sylvester Stallone’s Bullmastiff who was in the movie Rocky
• Pete from the movie Homeward Bound II: Lost in San Francisco
• Swagger: The Cleveland Brown’s live mascot

Looking for the right name for your new Bullmastiff? Below you’ll find some popular names for this dog breed:
• King
• Maximus
• Spirit
• Ace
• Legend
• Clara
• Anna
• Patience
• Zahra
• Sage

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