so far they are tearing up my mounds and my hillside but havent munched on the weed plants.
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If they are tearing up mounds with plants in them they are doing root damage. Cut up roots could turn into a root infection of some sort, 30-50 gallons of water a day would aggravate that situation. Might not ever happen, hope it doesnt, things look great at your place. I'd trap like hell unless you want to spend for the propane cannon. cats and snakes wouldnt hurt either, another two cents worth.