I think it's a yorkie thing! All of mine have been wildchilds but the youngest girl is the most insane, she will just zip around a room doing 50 miles an hour and does this most of the day and night. We get completely exhausted just watching her go. Once she lays down we think she will fianlly get some rest, but then she's back and zooming again. In our experience, once they hit about 5 years or so they start to quiet down but the energy is amazing. Wish I could get me some of that
