I found this, but don't know if this is what I need.? I'd like to vaccinate prior to showing to keep them from getting sick.. it is the same as shipping fever (I'm so confused :crazy ) I realized I didn't put any info.. :blush Poly Serum®, 250 ml (G5PC) (Novartis) For use as an aid in the prevention & treatment of enteric & respiratory conditions in cattle & sheep caused by Actinomyces pyogenes, E coli, Pasteurella haemolytica, Pasturella multocida & Salmonella typhimurium. Inject SQ or IM. For prevention in calves 20-40 ml, cattle 50-75 ml and sheep 10-15 ml. for treatment in calves 40-100 ml, cattle 75-150 ml and sheep 20-40 ml.