Take a look at this thread from the training forum.  It talks about poop, poop and more poop plus all this ways that you can try to get your pupster to stop eating poop. 

  Pineapple, spinach, pumpkin, Deter, meat tenderizer you name it it's been talking about in this thread.    
http://www.yorkietalk.com/forums/tra...ting-poop.html