I don't know what you mean by "separation anxiety" or "normal". Separation anxiety is not the same as separation anxiety disorder. It's like comparing being "slightly overweight" with "grossly obese" - one can be fixed with a bit intervention while the other takes drastic measures - likewise with separation anxiety and separation anxiety disorder. Could you describe what is occurring with your child so that we can better help you? And yes, separation anxiety is normal for a child of six years of age but separation anxiety disorder is not. Looking forward to your reply ....
I believe anyone at any age can go through seperation anxiety, could you enlarge is it when she leaves to go to school, on vacation ?