Our daughter took one of our does to the county fair in August, and a week after she came home every goat in our herd was coughing. Wormed, added electrolytes, changed all bedding and put down Sweet PDZ before the new straw. Two weeks later our senior buck got very sick and was dead in 24 hours. After that all our goats seemed fine but I did a round of penicillin for everyone anyways. Three days ago we noticed our other Nigerian buck gasping and rushed him to the vet, she gave him a bag of IV fluid, banamine and a Nuflor injection. He seemed to be getting better, then yesterday evening he suddenly died. I'm absolutely heartsick; we have new babies coming any day! I can't stand losing any more of our goats to this. I've heard of a mannheimia/pasturella vaccine, has anyone used it? In this case, would it be worth administering or should I not do it since the bug is already going? The vet's diagnosis was bacterial pneumonia made worse by hot humid days and cold nights.