Greenlight Many Purpose Dust will kill them in 10-15 minutes.The formula has changed over the years,but is still very effective. http://www.walmart.com/ip/Green-Light-Many-Purpose-Dust-1-lb/41529626
~Molɔ̀ːn Labé Skýla~
As Bob Hagel would say"You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong."Good words of wisdom...............
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