A field trial, where lambs were vaccinated at docking and weaning, demonstrated that vaccination was highly effective, lowering clostridial deaths by 23%. Prior to the use of multivalent vaccines, clostridial death was common and often killed large numbers of stock. How are clostridial diseases spread on farms? Are there on-farm practices that can help reduce the incidence of clostridial disease? Compared to stock losses, a vaccination program for clostridial disease is far less expensive.