Additional information (Wiki): The Cimarrón Uruguayo (Uruguayan Cimarron) is a breed of molosser type dog originating in Uruguay. The word cimarrón in Latin America is used to mean feral, referring to the breed's history.

The breed standard states that the dog should have great courage. As with all large dogs, the Cimarrón Uruguayo must be well socialized when very young if it is to be safely kept as a companion.

The Cimarrón Uruguayo is used for guarding, hunting, and all dog sports in its native Uruguay. The current president of Uruguay, Tabaré Vázquez, owns a Cimarrón dog.

The Cimarrón Uruguayo is descended from European dogs brought by early colonizers, and released or abandoned. The dogs adapted to living in the wild in Uruguay, and in time became numerous. In the eighteenth century, attacks on livestock and even humans resulted in the dogs being hunted, with bounties paid by the government for each dog killed. However, many remained, especially in the highlands of Cerro Largo. Ranchers in the area would capture and tame the dogs, using them as guard dogs.

The Cimarrón's survival story and fierceness has made it something of a national symbol in Uruguay, and the breed is the mascot of the National Army of Uruguay.