Hi There
There is another post called "Puppy Staff questions" which I answered last night. I have copied and pasted my answer to the other poster below.
Hope it helps:
Eating her own poo is completely normal. She may do it for several reasons, Nutrients missing in her food, Hunger or the pleasing (to a dog) scent! Its called Coprophagia.
She will probably grow out of it at around a year old. The best thing to do is to clear it up straight away to break the habit or if you wont always be able to do so, add something foul tasting (one would have thought that poo was horrible enough) to her poo to discourage her.
Good Luck xx