What do you get when you breed a wrinkly-faced Bull Dog with a giant Mastiff? 

A gentle giant known as a Bullmastiff. 

Although Bullmastiffs are physically imposing, they are unbelievably loving and patient. 

Here are some facts you may not know about Bullmastiffs.  

Breed History:

• Bullmastiffs were originally bred in England to be guard dogs. They were brought to the US by John D. Rockefeller to guard his country estate in Tarrytown, New York. 
• Instead of barking to scare away an intruder, Bullmastiffs quietly track the suspect. When the opportunity presents itself, this dog will apprehend and secure the poacher until help arrives. 
• Many Bullmastiffs have retired their guard hats and are now simply companion animals. 

Characteristics: 

• The Bullmastiff has dark hazel eyes and a black nose. It also has V-shaped ears that hang downwards.
• Bullmastiffs can be 25-27 inches tall and weigh up to 130 pounds. 
• They can be red, fawn, or dark brindle.

Reproduction:

• They attain reproductive maturity after 18 to 20 months.
• The average litter size is 8. 
• Breeding the Bullmastiffs needs to be done carefully, ensuring that they do not inherit genetic problems.

Health:

• These gentle giants rarely live past 10. 
• They can have health issues such as hip dysplasia, twisting tummy, bloating, breathing issues, and eye problems.
• Although large and muscular, Bullmastiffs have a moderate energy level, so they do not need much exercise.

Personality:

• The Bullmastiff is very submissive to its human family so long as proper socialization has occurred. 
• Given their natural guarding tendencies, this breed is very protective of its family. 
• Bullmastiffs prefer to live alone, and they do not like cats and other dogs.
• They cannot live in extreme weather conditions and are sensitive to both the heat and cold.