From First Yorkie: First, be very careful not to scold or punish for pooping incorrectly. What she learns in that case isn't that she shouldn't poop in the house, but that it isn't safe to poop in your presence. Not what you want to teach!
Wow, I never thought of it that way. No wonder she hides when she poops. I wonder why that never happened with peeing. *sigh, she's such a good girl most of the time, this is just getting a little frustrating.
Thanks for all the encouragement, I hope this too will pass