“Salt, which is mainly sodium, is needed for all kinds of things. And most often in animals, and especially herbivores, a sodium hunger corresponds with a deficiency. This happens in deer and other North American ungulates, squirrels, cottontails, etc., and even porcupines in my area,” shared Dr. H. "Mick" Weeks, Forestry and Natural Resources, Purdue University.
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Outdoors Notebook: Why Deer Crave Salt