Have you tired the products out there that make the poo taste bad so they won't eat it?

Also they sell basket muzzles that you can cover the end with duct tape so when you pupper goes to eat the poo they can't get to it. They can still breath, and drink with this on but I would suggest just using the muzzle when she's outside so she can't eat her poo.

Those are all the suggestions that I have so far.