Did you get that info from a Crystalyx distributer or a Crystalyx employee.  I know last fall I got better answers from a Crystalyx field man than I had been getting from their distributer.  Check it out direct with Crystalyx if you did not get the information from them.

Ran across some info from a production meeting put on by the local extension guys.  A local vet said to reduce occurrance of scours you should move the uncalfed cows to a new calving area every 2 weeks.  Scours comes from the bacteria in waste and by moving the uncalfed cows to a new calving area greatly reduces the chances of scours in the later calving cows.  This was supported by a study on a ranch where they kept moving uncalved cows to a new pen every two weeks.  Reduced scours by about 80%.  Check with you local vet on this.  The study was done in Nebraska.