Yes this breed can be very difficult to potty train. The breed really needs to be on a routine. And yorkies need lots of praise too when they do right. They love to make us happy
I was very impressed w/ Sassy's puppy...VERY impressed. She picked up the potty training thing like it was nothing. Thats a major reason why we kept her, she's so special/smart. My friend has two yorkies and they took forever to potty train too. I know it's frustrating, but it will get better. Just stick it out and you'll be glad you did. You don't wanna be still potty training her as an adult..it'll be much more difficult. Good luck to you! There's a lot of good books out there too. Good luck!