1. The Bullmastiff is a breed that originated in England during the 19th century. It was developed by crossing Bulldogs and Mastiffs to create a powerful yet agile guardian and protector.

2. Bullmastiffs were originally bred to guard and protect large estates and properties from poachers. They were meant to be a strong and intimidating presence, but also agile enough to catch intruders.

3. These dogs are known for their strong and muscular build. They have a short coat that can come in various shades of fawn, red, or brindle. The distinctive black mask on their face adds to their unique appearance.

5. Bullmastiffs are large dogs. Males typically weigh between 110 to 130 pounds (50 to 59 kg), while females weigh around 100 to 120 pounds (45 to 54 kg). They stand about 24 to 27 inches (61 to 68 cm) tall at the shoulder.

6. While Bullmastiffs are not overly energetic, they do require regular exercise to maintain a healthy weight and mental stimulation. Daily walks and moderate playtime are usually sufficient for their exercise needs.

8. The Bullmastiff's short coat is relatively low-maintenance. Weekly brushing can help control shedding and keep their coat looking healthy. Regular maintenance of their nails, teeth, and ears is also important.

8. Like many large breeds, Bullmastiffs can be prone to certain health issues such as hip and elbow dysplasia, bloat, and certain types of cancer. Regular veterinary check-ups and a healthy diet can help mitigate these risks.