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Sorry to have went missing. I've just been very busy with school and our family has been passing around the same upper respiratory virus the past two weeks:( We have yet to figure out our problem. To add another piece to the puzzle the same seems to be occurring with our sheep as they have began...

Thank you for all of the information. I have skimmed through the provided links and will review them closer. Its been 4 years since we used the Bovi Shield and I was certain it contained Hardjo, but could be wrong. In recent years we have used this: VISTA 5 L5 SQ A live vaccine for cattle...

Thank you for your response:) Where are you? North central Iowa near the MN border What do the cows eat? Sweetcorn silage mostly and some rolled wheat Do you vaccinate for Lepto generically and Lepto hardjo bovis specifically? We've used Bovishield Gold, Vista, or Triangle 9 + Type II BVD...

We have about 20 Angus and commercial Simmi cows. They are well cared for and vaccinated (Vista or Bovishield Gold) and poured regularly. They have clean reproductive histories. Range from first calf heifers to 9 yrs old. Receive mostly vitaferm minerals and occasionally an alternate brand...