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DuraLyte Calf paste contains a source of live (viable) direct fed microorganisms to establish normal gut microflora, electrolytes to replace essential minerals lost during scours, activated clay to help bind toxins, which can slow the onslaught of scours, and other digestive supplements. Can be used as adjunct therapy with antibiotics or in conjunction with DuraZyme Paste; sold separately. Feed 15-30 gm on the back of the tongue.