Man, I don't know how big your operation is but that has got to hurt any size herd.
I asked my vet about blackleg last time we vaccinated, because we had just bought some cattle a couple hundred miles away and we were told everyone there nails calves soon as they hit the ground for blackleg.
Our vet said blackleg was not a problem in our area and our once a year on the cows, and calves at weaning was sufficient. She did say we had to vaccinate for lepto because of how our farm allows the cattle to share areas with deer. What you are experiencing sounds more like lepto to me. Maybe something has changed in your area and you need to alter your vaccination program.
I am in a program where I have to have the vet by at least once a year, and she designs my vaccination protocols but even if I wasn't in that program I would have her take care of vaccinations and inspect the herd at the same time. Just good business, and liability protection. ( And do my darndest not to see her again until next year! ).
You did leave us a little short on info, but if you are real new you need to get some help out there before you lose everything. You could be dealing with 2 different problems as well, like Beefy said. But that is your call.
You should disregard comments from big hat no cattle and others of his ilk, the quality of his advice is evident. Just skip by that avatar everytime you see it.
As you can see there are others who give excellent advice without the pathetic character flaw of needing to extract a pound of flesh each time advice is given.
I for one would really like an update, once again your call.
Good Luck!!
