We recently vaccinated our cows. They were acting really sick and a few of them couldn't even get up. They would try but just couldn't stand on their legs. My Dad used Scour Bos 9 on them, and also Vitamin A. He said he used the Bos 9 in the Spring and he wasn't supposed to used it again, but they were out of the Bos 4 and he didn't think it would hurt. He has never used Vitamin A on them before, so he thought that might be causing it as well. We found a cow dead this morning. Could one of these things have caused them to abort, and have one so far die. Or might it be something else. If so is there a way to counteract it?