Know about Gran Mastin de Borinquen

Gran Mastin de Borinquen


The Gran Mastin de Borinquen is also called the Puerto Rican Mastiff, Becerillo de Borinquen, Perro Barsino de Hacienda and Mastin Boricano. This is the only native breed of the island of Puerto Rico. This breed is a mixture of Spanish War Mastiffs, Latin American Molossers and local island dogs, which were brought to the island to protect from colonial times.


Gran Mastin de Borinquen

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The Gran Mastin de Borinquen is rarely available these days and was internationally declared as a rare breed in 1979 by Ia Sociedad Cynologica Cariberia. These Gran Mastin de Borinquen are originally the “Old Country” dogs which are adapted to the cold rain forests, hot hills and the tropical valleys of the island Pierto Rico. The folks from near or far would come and acquire a Gran Mastin de Borinquen pup in exchange of kind, game chickens, dogs, goats or friendship.

The history of this breed is deeply related to the history of the Spanish conquest of the Americas. For many years, the Spanish dignitaries kept these Molossi, also called Bloodthirsty. These were kept for protection from feral steer, dogs and boar and could fight them to death, if required. During the earlier days, these dogs were used to attack on humans and they did this to show their loyalty towards their masters. The Mastins are noble, loyal and courageous. Many of them died protecting their masters during the Spanish-Indian wars.

Historians across the world gave the theory that these dogs were originally domesticated before twenty five thousand years.



The Gran Mastin de Borinquen pups between 8 and 12 weeks require four bowls of food per day. When these puppies grow to the age of 3 to 6 months, they should be fed three meals in a day. The pups of age 6 months to 1 year are given 2 bowls of food in a day. When the Gran Mastin de Borinquen reaches its first birthday, it is to be given only 1 bowl of food.

The Gran Mastin de Borinquen need daily physical exercises to remain in proper shape, keep their brains charged and be fit and healthy. The daily exercises also help them in overcoming the boredom and prevents any unusual behaviour. Their urge to chew, dig, herd, retrieve or chase can be fulfilled by playing outdoors. The amount of exercise depends on the health, age and gender of the dog. The Gran Mastin de Borinquen of six to eighteen months adolescence requires more outdoor activities than a ten minute activity and a small walk.

They should go through exam, shots and heartworm screening every year or when they are injured or sick.


Gran Mastin de Borinquen

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They require frequent brushing to avoid much of the shedding. They should be inspected for the fleas and ticks daily during warm weathers or summers to avoid any of the allergies or infections. The mats on the coat must be cut or removed before giving them a bath, and all the soap must be removed from their coat else dirt would stick to it.



The Gran Mastin de Borinquen are well behaved and a great companion. But if they are untrained, they can be a major trouble. They should be taught the fundamentals, like, “Down”, “Stay”, “Come”, etc which will improve their relationship with the master and also with the guests.

The Gran Mastin de Borinquen should be always kept leashed, except when at home or in a fenced area.

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