FILE - In this Feb. 18, 2009 file photo, feral pigs roam near a Mertzon, Texas ranch. The Texas agriculture commissioner announced Tuesday, Feb. 21, 2017, that he has approved the use of a poison that he says may herald a "feral hog apocalypse" in a state where an estimated 2.5 million hogs roam. Commissioner Sid Miller said this week that bait food will be laced with warfarin, which is used as a blood thinner but has proven lethal to hogs. (AP Photo/Eric Gay, File)
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