The dairy cows wobbled unsteadily on their hooves, their tongues lolled about and the membranes of their eyes reddened. What triggered these odd symptoms? A diet of industrial hemp, researchers say.


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The dairy cows wobbled unsteadily on their hooves, their tongues lolled about and the membranes of their eyes reddened. What triggered these odd symptoms? A diet of industrial hemp, researchers say.