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livestock guardian dog
A livestock guardian dog (LGD) is a type of pastoral dog bred for the purpose of protecting livestock from predators.
Livestock guardian dogs stay with the group of animals they protect as a full-time member of the flock or herd. Their ability to guard their herd is mainly instinctive, as the dog is bonded to the herd from an early age. Unlike the often smaller herding dogs that control the movement of the livestock, LGDs blend in with them, watching for intruders within the flock. The mere presence of a guardian dog is usually enough to ward off some predators, and LGDs will confront predators by vocal intimidation, barking, and displaying very aggressive behavior. The dog may attack or fight with a predator to protect the flock, if they are not able to drive predators off otherwise. Livestock guardians may actively look for predators within protected territory to catch and destroy them, and there are known cases of dogs luring coyotes to the source of food to hunt them.
==History==
The use of dogs in protecting livestock originated over 2000 years ago, with their use being recorded as early as 150 BC in Rome. Both Aristotle's ''History of Animals'' and Virgil's ''Georgics'' mention the use of livestock guardian dogs by the Molossians in the ancient region of Epirus. Many of the modern day livestock guardian dogs are thought to descend from the extinct Molossus breed used by the Molossians.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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