I have two yorkies...one is 7 lbs and the other is 3 lbs. The 3 lb. one has had some issues. BUT i wouldn't trade them for ANYTHING. I have always had outside dogs, so I am new at this too, but what I have figured out about yorkies is that they are so flipping smart! They are very eager to please as well. My boys are 11 and 10.5 mo. old and are almost completely potty trained. It is 100% the owners fault if your dog doesn't potty train. You have to be consistant. They tell you pretty much most of the time, it is very easy to miss the sign, But you get the hang of it. They are wonderful additions to our family and I highly recommend a yorkie to anyone!!!