Gran Mastin de Borinquen History
The Gran Mastin de Borinquen (commonly misspelled as “Borinquen”) is a medium-large American mixed-breed hound. It is the result of a breeding program started in 1969 by Donald B. MacMillan. The “Gran” in its name refers to its size, while the suffix “Mastin” means “faithful” or “loyal”. The “Borinquen” in its name refers to the Borinquén, the Taíno term for the island of Puerto Rico. The Gran Mastin is a loyal and loving companion and makes a good watchdog. It is a hardy, agile, and intelligent hunter, and packs a solid wallop when driven.
Gran Mastin de Borinquen Physical Characteristics
The Gran Mastin de Borinquen is a medium-large breed of dog originating in Puerto Rico. It was developed years ago by crossing other dogs with breeds like the Great Pyrenees. These dogs were originally used as a working breed, herding cattle and guarding property, however, they are also known for being excellent family pets. The Gran Mastin de Borinquen is a sturdy, muscular, large-boned, well-proportioned, active, powerful, agile, intelligent, and willful animal. They are equipped with a double coat of medium length that is rough and thick that protects them from extreme weather conditions. Their head is massive and triangular in shape. The muzzle is moderately long, with well developed teeth that are wide apart, and has a level bite. The nose is black in color. Their ears are erect and fairly large. They are set high on the head and hang close to the cheeks. The tail is customarily docked; it measures 2.5 to 4.5 inches in length. The eyes of the Gran Mastin are almond shaped and come in various shades of gold, amber, and dark brown. They possess great intelligence and drive. They are courageous, fearless, and loyal to the family. The temperament of the breed is best described as playful, loving, devoted, trustworthy, and protective.
Eye Colors
Brown
Nose Colors
Black
Coat Colors
Black, Fawn, Brindle, White
Height Range
Male Height Range: 24 – 28 inches
Female Height Range: 22 – 26 inches
Weight Range
Male Weight Range: 99 – 150 lbs
Female Weight Range: 90 – 130 lbs
Gran Mastin de Borinquen Health
Description of breed health.
Lifespan
9-12 yrs
Gran Mastin de Borinquen Health Concerns
Elbow Dysplasia, Hip Dysplasia, Entropion, Ectropion
Gran Mastin de Borinquen Temperament and Behaviour
The Gran Mastin is a calm, confident, and good-natured dog. They are people-oriented and get along well with older children. They are protective of their family and make excellent guard dogs. They are known to have an even disposition, which means that they are neither aggressive nor shy.
Gran Mastin de Borinquen Activity Requirements
The Gran Mastin de Borinquen is a small, muscular mastiff that originates from Puerto Rico. The breed is known for being loyal, intelligent, and protective. The Gran Mastin de Borinquen is a very active dog that enjoys playing, walking, and participating in games of fetch. They are known for being strong, independent, and energetic. They need at least one hour of activity each day. This large, powerful, and high-energy dog is not a good choice if you are away from home for long periods of time. They require a great deal of exercise and companionship. If you are considering a Gran Mastin de Borinquen, make sure you can give them the time and attention they need. They are happiest when they are with their family and participating in family activities.
Miles Per Day
8 miles
Activity Per Day
30 minutes
Daily Food
3 cups
Kennel Club Recognition

American Kennel Club
Not Recognized
Gran Mastin de Borinquen is part of the Unclassified group.
Visit the American Kennel Club website.

The Kennel Club
Not Recognized
Gran Mastin de Borinquen is part of the Unclassified group.
Visit the Kennel Club website.

Australian National Kennel Council
Not Recognized
Gran Mastin de Borinquen is part of the Unclassified group.
Visit the Australian National Kennel Council website.

Canadian Kennel Club
Not Recognized
Gran Mastin de Borinquen is part of the Unclassified group.
Visit the Canadian Kennel Club website.