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| Keep vaccinating, I vaccinate 3 weeks prior to calving with Pfizer Gold 5FP, and Scour Guard K4+, use a very good mineral program with organic selenium, no sick calves, no open cows, no antibiotics in the frig, others can tell you the mineral program is paramount. Did use 1st Defence back many years ago, I cannot honestly say that it worked, maybe. Talked to other producers that are convinced on this thing. I calve in Jan/Feb. | |
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First defense bolus
