Pineapple works !!!!!
My shih tzu Leo had a big problem. I tried meat tenderizer, changing foods, and being actually militant about watching him poop (very creepy I know
).
I saw the pineapple trick about yorkies and I tried it on him and he hasn't eaten poop since. I am slowly weaning him off of the pineapple to hoping that he doesn't go back to it.