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					Originally Posted by gutu28  .. usually its right after I pet on her for a long time and her hair is right on her body..she does it to fluff up a bit..or right after a nap.. | 
 
  This is our experience too.  I kinda figured it was equivalent to our little tics we have when we feel tired or uncomfortable, or what have you....like stretching, or shaking ourselves awake, etc.