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					Originally Posted by  JackNDaisy     I have dealt with "Rage" before and what you described sounds more like dominance or rabies reaction than rage. Rage in Great Pyrenees is generally thought to be caused by a tumor in the brain causing something almost seizure-like with the aggression. when they come out of it they are disoriented and dont seem to realize that anything went on. in every other way a dog with rage is a normal, happy dog and acts like any other dog of the breed except during those moments of rage.   
hope this helps some   |  
 
  I really think it is a dominance issue. If it is rabies reaction, it was minor. It never showed itself again but I will now be more observant when rabies shots are given. She isn't aggressive but seemed to be exercising her "big girl" feelings especially since Dezi was the dominant one when Cassidy came into the picture. But now Cassie is slightly bigger than Dezi and she looks as if she is enjoying this new sense of self. Thanks for all the info.