A.If this is due to a pica condition (the term used when animals consume non-food items such as feces, rocks, and other objects), one product I have seen work is Sea Meal by Solid Gold. This product is indicated directly for stool eating, but may help your friend’s puppy. She could also consider “training” the dog by coating rocks with a bad-tasting product like bitter apple. I have also seen a hot pepper sauce work. If this is truly a behavioral problem, then I would consult a specialist in the field of dog behavior modification.