Audrey,
You are not alone, although my girls have never done this, thank goodness.
I've heard all kinds of solutions but one that seems to work is sprinkling Alum powder on the poop (I assume that's what she is eating). You have to be diligent, but she will learn it is YUCKY. I know there are also commercial remedies that you add into the food when they eat that makes the poop taste real bad (as if it doesn't taste bad already).
There apparently are a couple of reasons why this happens in the first place, either boredom, or a lack of some nutrient in their food. I am no expert, and hopefully someone else will chime in and help you.
Good luck. I know it is a disgusting problem, but many, many dogs do the exact same thing.
Logan