Karelian Bear Dog - Wikipedia, the free encyclopedia “This dog will put a bear to flight or attack it with great pugnacity and will sacrifice its own life for its master.” “They are silent but tenacious hunters and only alert when they have the prey at bay. They will keep it there by barking in a very high, fast bark and running back and forth or around the animal until the master comes and kills it. They have been known to hold an animal at bay a very long time. If a bear tries to leave, the dog will nip at it on the backside and aggravate it to keep it from running away.”
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Karelian Bear Dog - Wikipedia, the free encyclopedia

“This dog will put a bear to flight or attack it with great pugnacity and will sacrifice its own life for its master.”

“They are silent but tenacious hunters and only alert when they have the prey at bay. They will keep it there by barking in a very high, fast bark and running back and forth or around the animal until the master comes and kills it. They have been known to hold an animal at bay a very long time. If a bear tries to leave, the dog will nip at it on the backside and aggravate it to keep it from running away.”

Source: Wikipedia