BVD in Cattle

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Across
  1. 4. one of the clinical signs
  2. 5. this type of herd means no new livestock are brought onto the farm, all replacement livestock are bred on the farm
  3. 6. treatment ?
Down
  1. 1. one of the main control methods, might be needed yearly
  2. 2. the 'V' in BVD
  3. 3. the 'P' in PI
  4. 5. infected cattle or calves could be this, to stop the spread of BVD