FIRST DEFENSE® TRI-SHIELD™ combines the E. coli and coronavirus antibodies contained in FIRST DEFENSE®, with rotavirus antibody content to produce the only product on the market with trivalent protection against three of the leading pathogens that lead to calf scouring. Preventing scours in newborn calves reduces the need to use treatment antibiotics later in life. Comes in a gel tube delivery format. TRI-SHIELD PASTE PACK OF 12 TUBES