On Saturday, we lost a calf to a very fast acting tetnus. It was totally normal and 2 hours later it was dead. The vet said she sees these cases VERY rarely but has seen 5 this year. The tetnus spores are much bigger/stronger after a warm dry winter such as we have had this year. Needless to say, all calves are getting tetnus shots from now on. But the problem is, I don't know how much to give them. I've searched for it and can't find any answers. So, how much? Does anyone know?