In my experience Yorkies are hard to housebreak, but I decided it is just because they are so stubborn. It took me a year to train my last yorkie, shelby, I would take him out and we would walk and walk and walk and come in the house and he would stand there and look right at me and go on the carpet.. but his face was so cute--well ya know... and he knew that...so I finally got him trained using a crate. But it is not just housebreaking they are stubborn about. In my house it was a matter of who was more stubborn, me or him..I usually won out, but it was not an easy win...but it was all worth it. they are just so loving and sweet. I also think some of it was payback for leaving him to go to work everyday. But I tried to explain to him, "mommy don't work, you don't eat or have a nice warm house"..he just didn't want to hear it..Be patient it will be so worth it... I wish I still had my baby here to aggravate me.
