I've tried Deter and Pineapple, but neither worked. Now I'm going to tell you what worked with my Yorkie (b/c she doesn't eat poop anymore), but remember all Yorkies are different. You ready? TIME!
In due time she got tired of eating her poop as she got older. She's 7 months now. But, unfortunately, some 7m/o furbabies still eat their poop. It's nasty/gross/disgusting, but most Yorkies grow out of it. That's what everyone here on YT told me and I wouldn't believe it until it finally happened!
Good luck!