BILL POTEAT Alligator weed won't eat chickens, cats, or small dogs, but it can put a hurting on Gaston County lakes and rivers. Think about it as kudzu on the water - just as prolific in its growth and just as difficult to contain. A century ago, the weed grew naturally only in the temperate regions of South America, including Argentina, Brazil, Paraguay and Uruguay. But, due to its parasitic nature, it hitched a ride aboard a cargo ship or two and has since become established across the southeastern United States, including in the waters of the South Fork, the Catawba, and Lake Wylie.