updated 11/12/2010 2:40:25 PM ET 2010-11-12T19:40:25

A 150-pound mountain lion was no match for a squirrel-chasing terrier on a farm in eastern South Dakota.

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Jack the Jack Russell weighs only 17 pounds, and yet he managed to trap the cougar up a tree on Tuesday.

Jack's owner, Chad Strenge, told The Argus Leader that the dog "trees cats all the time," and that the plucky terrier probably "figured it was just a cat."

Professor Jonathan Jenks, who tracks cougar migration patterns, says hunters usually need two or three hounds to chase a lion up a tree. He says the cat probably wasn't hungry enough to attack Jack.

Strenge used a shotgun to knock the mountain lion from the tree and — assisted by Jack — chased and fatally shot it.

Arden Petersen, of the wildlife division of Game, Fish and Parks, told The Madison Daily Leader that no charges will be filed.

Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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